Deep-buried pipeline inspection well system suitable for water-rich quicksand stratum
By setting a crossing pipe at the intersection of the inspection well and the deep-buried sewage pipe, and installing anchor rods and grouting drainage pipes on the well wall and bottom plate, the problem of the inspection well floating or sinking in the water-rich quicksand formation is solved, and the structural stability of the inspection well is enhanced.
Patent Information
- Application Number
- CN202422689466.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-09-12
- Estimated Expiration
- 2034-11-05
AI Technical Summary
In the prior art, deep-buried pipeline inspection wells in water-rich quicksand formations are prone to floating up or sinking due to buoyancy and underground undercurrents, damaging the pipelines at the intersection and being unable to effectively resist lateral water and soil pressure.
A crossing pipe is set at the intersection of the inspection well and the deep buried sewage pipe, and connected through connecting ends to enhance shear strength; inclined anchor rods and reinforcement anchor rods are installed on the well wall and bottom plate, combined with grouting drainage pipes for reinforcement and drainage, to enhance the ability to resist settlement or floating.
The shear strength and ability to resist subsidence or floating of the inspection well are improved, ensuring the structural stability of the inspection well and avoiding damage to the pipes at the intersection.
Smart Images
Figure CN223329965U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of building construction, in particular to a deep-buried pipeline inspection well system suitable for water-rich quicksand strata. Background Art
[0002] Urban stormwater and sewage pipelines are often designed to be buried at a relatively deep depth, as they must avoid underground structures and obstructions, and cross rivers. Deeply buried stormwater and sewage pipelines often utilize long-distance pipe jacking, requiring the construction of inspection wells. When pipelines are located in water-rich, quicksand formations, the inspection wells must withstand significant lateral earth pressure and act as water stoppers. Conventional hollow masonry structures with cast-in-place concrete are not suitable. Instead, a monolithic cast-in-place concrete structure is required to meet the requirements for retaining soil and water, and resisting lateral water and soil pressure.
[0003] At present, in the existing technology, after the bottom plate of the integral cast-in-place concrete structure inspection well is sealed, a closed box is formed in the soil layer. In the water-rich sand formation, when the groundwater level is high in the rainy season, the buoyancy of the inspection well increases, which may cause the inspection well to float as a whole and damage the intersecting pipes; and when the underground undercurrent is relatively rich and erodes and hollows out the sand around and at the bottom of the inspection well, it may cause the inspection well to sink and crush the intersecting pipes.
[0004] Therefore, it is very necessary to urgently need a deep-buried pipeline inspection well system suitable for water-rich quicksand strata to solve the existing technical problems. Utility Model Content
[0005] The purpose of the utility model is to provide a deep-buried pipeline inspection well system suitable for water-rich quicksand formations to solve the above-mentioned defects.
[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:
[0007] A deep-buried pipeline inspection well system suitable for water-rich quicksand formations comprises: a deep-buried sewage pipe and an inspection well, a crossing pipe section is provided on the deep-buried sewage pipe at the intersection with the inspection well, both ends of the crossing pipe section are connected in series with two deep-buried sewage pipes through connecting ends, and both connecting ends are fixed in the well wall of the inspection well; a plurality of inclined well wall reinforcement anchor rods are fixedly installed on the outer wall of the inspection well, a bottom plate is provided at the inner bottom of the inspection well, a plurality of inclined bottom plate locking anchor rods are fixedly installed at the outer periphery of the bottom plate, and bottom plate reinforcement anchor rods and grouting drainage pipes are fixedly installed vertically under the bottom plate.
[0008] Preferably, the pipe diameter of the crossing section pipe is larger than the pipe diameter of the deep-buried sewage pipe, and the connecting end is a transition connection structure with one end expanding outward and the other end contracting, the expanding end is connected to one end of the crossing section pipe, and the contracting end is connected to one end of the deep-buried sewage pipe.
[0009] Preferably, a lining steel support is installed in the crossing section pipe, and the lining steel support is an outer circle and inner square structure.
[0010] Preferably, the plurality of well wall reinforcement anchor rods are divided into at least two groups, and each group of well wall reinforcement anchor rods has at least two anchor rods and are radially distributed on the outer wall of the inspection well.
[0011] Preferably, the well wall reinforcement anchor rod is a hollow structure, its length is the same as the diameter of the inspection well, and it is installed at a 45° downward tilt along the radial side of the inspection well. Its inner upper end is anchored to the outer wall of the inspection well, and its outer lower end is anchored in the soil outside the inspection well.
[0012] Preferably, the bottom plate locking anchor rod is a hollow structure, its length is half the depth of the inspection well, and it is installed at a 45° downward tilt along the radial side of the inspection well, its inner upper end is anchored to the bottom plate of the inspection well, and its outer lower end is anchored in the soil outside the inspection well.
[0013] Preferably, the bottom plate reinforcement anchor rod is a hollow structure, its length is the same as the diameter of the inspection well and it is vertically installed under the bottom plate, its upper end is anchored to the bottom plate, and its lower end is anchored in the soil below the inspection well.
[0014] Preferably, the lower end of the grouting drainage pipe is buried in the soil below the inspection well, and the upper end thereof passes through the center of the base plate. The outer wall or inner wall of the grouting drainage pipe located on the base plate is provided with an external thread or an internal thread and a nut or an inner plug is installed through the thread.
[0015] Preferably, a plurality of annular high-pressure rotary jet piles evenly distributed in an annular shape are vertically arranged in the soil outside the inspection well, and the length of the piles is 150% of the depth of the inspection well.
[0016] The beneficial effects of the present invention are:
[0017] The utility model is suitable for a deep-buried pipe inspection well system in water-rich and flowing sand formations. By providing a through-section pipe connected by a connecting end on the deep-buried sewage pipe at the intersection with the inspection well, the shear strength of the deep-buried sewage pipe is enhanced. By installing well wall reinforcement anchor rods on the outer wall of the inspection well and installing bottom plate locking anchor rods and bottom plate reinforcement anchor rods on the bottom plate, the ability of the inspection well to resist subsidence or floating can be effectively improved. A grouting drainage pipe is installed on the bottom plate of the inspection well, and the grouting drainage pipe can be used to grout the surrounding area and bottom of the well body for reinforcement or drainage, effectively enhancing the ability of the inspection well to resist subsidence or floating. The utility model is suitable for a deep-buried pipe inspection well system in water-rich and flowing sand formations. It has a compact structure, effectively improves the shear strength of the deep-buried sewage pipe and the ability of the inspection well to resist subsidence or floating, and is easy to operate, practical, convenient, safe and reliable. BRIEF DESCRIPTION OF THE DRAWINGS
[0018] Figure 1 : A schematic structural diagram of the utility model;
[0019] Figure 2 : A schematic structural diagram of the deep-buried sewage pipe and the cross-section pipe of the present invention;
[0020] Figure 3 : A cross-sectional view of the inner lining steel support of the present invention. DETAILED DESCRIPTION
[0021] The present invention is further described below in conjunction with the embodiments. It should be noted that these are merely examples and illustrations of the concept of the present invention. Technicians in this technical field may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the concept of the utility model or exceed the scope defined by the claims, they should be deemed to fall within the scope of protection of the present utility model.
[0022] Example 1:
[0023] like Figure 1-3 As shown, a deep-buried pipeline inspection well system suitable for water-rich quicksand formations includes: a deep-buried sewage pipeline 1 and an inspection well 2.
[0024] like Figure 2 As shown, a crossing section pipe 9 is provided on the deep-buried sewage pipe 1 at the intersection with the inspection well 2. Both ends of the crossing section pipe 9 are connected in series with the two deep-buried sewage pipes 1 through connecting ends 91, and the two connecting ends 91 are both fixed through the well wall of the inspection well 2. The pipe diameter of the crossing section pipe 9 is larger than the pipe diameter of the deep-buried sewage pipe 1. The connecting end 91 is an over-connection structure with one end expanded outward and the other end contracted. The expanded end is connected to one end of the crossing section pipe 9, and the contracted end is connected to one end of the deep-buried sewage pipe 1. That is, the two connecting ends 91 are respectively fixed through the two well walls of the inspection well 2, wherein the crossing section pipe 9 is arranged in the inspection well 2 and connected between the two connecting ends 91, and the two sections of the deep-buried sewage pipe 1 are respectively arranged on the two connecting ends 91 outside the inspection well 2. The connecting end 91 is a smoothly expanded and thickened pipe structure, which can effectively improve the shear strength of the connecting end 91, and the smoothly expanded structure reduces stress concentration.
[0025] The inner lining steel support 92 is installed in the through-section pipe 9, and the inner lining steel support 92 is a round outer and square inner structure. Figure 3 As shown, the inner lining steel support 92 can be a frame structure with an outer round tube and an inner square tube fixedly sleeved, or it can be an integrated structure with a round outer wall and a square inner wall. The inner lining steel support 92 can effectively improve the shear strength of the through-section pipe 9.
[0026] like Figure 1As shown, a number of inclined well wall reinforcement anchor rods 4 are fixedly installed on the outer wall of the inspection well 2. The several well wall reinforcement anchor rods 4 are divided into at least two groups. Each group of well wall reinforcement anchor rods 4 has at least two well wall reinforcement anchor rods 4 and are radially distributed on the outer wall of the inspection well 2. The well wall reinforcement anchor rod 4 is a hollow structure. Its length is the same as the diameter of the inspection well 2. It is installed at a downward inclination of 45° along the radial side of the inspection well 2. Its inner upper end is anchored to the outer wall of the inspection well 2, and its outer lower end is anchored in the soil outside the inspection well 2.
[0027] The siding of the inspection well 2 is cast in sections from top to bottom. Before each section is cast, at least one set of inclined siding reinforcement anchors 4 is installed in that section, ensuring that the length of the anchor ends of the siding reinforcement anchors 4 protruding from the soil is no longer than the thickness of the siding of the inspection well 2. The siding reinforcement anchors 4 are then reinforced by grouting within the soil in which they are embedded. Finally, the siding of that section is cast and fastened to the anchor ends of the siding reinforcement anchors 4 protruding from the soil. The siding of all sections of the inspection well 2 is cast in a similar manner. This allows the siding reinforcement anchors 4 to be anchored in the soil and cast into a single unit with the siding of the inspection well 2, enhancing the inspection well's ability to resist subsidence or uplift.
[0028] like Figure 1 As shown, a bottom plate 3 is provided at the inner bottom of the inspection well 2, and a number of inclined bottom plate locking anchor rods 5 are fixedly installed on the outer periphery of the bottom plate 3. The bottom plate locking anchor rods 5 are hollow structures, their length is half the depth of the inspection well 2, and they are installed at a 45° downward inclination along the radial side of the inspection well 2. Their inner upper ends are anchored to the bottom plate 3, and their outer lower ends are anchored in the soil outside the inspection well 2.
[0029] A bottom plate reinforcement anchor rod 6 is vertically fixed under the bottom plate 3. The bottom plate reinforcement anchor rod 6 is a hollow structure. Its length is the same as the diameter of the inspection well 2 and it is vertically installed under the bottom plate 3. Its upper end is anchored to the bottom plate 3 and its lower end is anchored in the soil below the inspection well 2.
[0030] A grouting drainage pipe 7 is fixedly installed vertically under the bottom plate 3. The lower end of the grouting drainage pipe 7 is buried in the soil below the inspection well 2, and its upper end passes through the center of the bottom plate 3. The outer wall or inner wall of the grouting drainage pipe 7 on the bottom plate 3 is provided with an external thread or an internal thread and a nut or an inner plug is installed through the thread.
[0031] After the well wall reinforcement anchor rods 4 and the well wall of the inspection well 2 are cast, first, all the inclined bottom plate locking anchor rods 5 are installed and grouting reinforcement is carried out; secondly, all the bottom plate reinforcement anchor rods 6 are vertically driven into the bottom of the inspection well 2 and grouting reinforcement is carried out; then, a grouting drainage pipe 7 made of galvanized steel pipe is installed at the center of the bottom of the inspection well 2, so that the grouting drainage pipe 7 leaks out of the preset top elevation of the bottom plate 3 by 10 cm, and is installed with a nut or an inner plug through a threaded connection; finally, concrete is poured on the bottom plate 3 to combine the bottom plate locking anchor rods 5, the bottom plate reinforcement anchor rods 6 and the grouting drainage pipe 7 together.
[0032] The bottom plate locking anchor rods 5 and the bottom plate reinforcing anchor rods 6 not only play the role of resisting pull-out and anti-settling, but also reinforce and compact the bottom soil of the inspection well 2, providing a foundation for the concrete pouring of the bottom plate 3 of the inspection well 2.
[0033] Several ring-shaped, evenly distributed high-pressure jet grouting piles 8 are vertically arranged in the soil outside the inspection well 2, with a length of 150% of the depth of the inspection well 2. The ring-shaped, high-pressure jet grouting piles 8 can further strengthen and compact the soil around the inspection well 2, while preventing the high-pressure jet grouting slurry from seeping into the deep-buried sewage pipe 1 and the inspection well 2.
[0034] The utility model is suitable for a deep-buried pipe inspection well system in a water-rich sand formation. During later use, if water and soil loss around the inspection well 2 causes cavities around the well body and at the bottom, grouting and consolidation can be carried out through the grouting drainage pipe 7 to reduce well body settlement. If the water level around the inspection well 2 rises, causing the buoyancy of the groundwater to increase, the grouting drainage pipe 7 can be used to drain water and reduce the well body from floating up.
[0035] The present utility model is suitable for a deep-buried pipe inspection well system in a water-rich quicksand formation. By providing a through-section pipe 9 connected by a connecting end 91 on the deep-buried sewage pipe 1 at the intersection with the inspection well 2, the shear strength of the deep-buried sewage pipe 1 is enhanced. By installing a well wall reinforcement anchor rod 4 on the outer wall of the inspection well 2 and by installing a bottom plate locking anchor rod 5 and a bottom plate reinforcement anchor rod 6 on the bottom plate 3, the ability of the inspection well 2 to resist subsidence or floating can be effectively improved. A grouting drainage pipe 7 is installed on the bottom plate 3 of the inspection well 2. The grouting drainage pipe 7 can be used to grout the surrounding area and bottom of the well body for reinforcement or drainage, effectively enhancing the ability of the inspection well 2 to resist subsidence or floating.
[0036] The utility model is suitable for a deep-buried pipe inspection well system in a water-rich sand formation. It has a compact structure, effectively improves the shear strength of the deep-buried sewage pipe 1 and the ability of the inspection well 2 to resist settlement or floating. It is easy to operate, practical, convenient, safe and reliable.
[0037] The above is an exemplary description of the utility model. Obviously, the specific implementation of the utility model is not limited to the above-mentioned method. As long as such non-substantial improvements are made by adopting the method concept and technical solution of the utility model, or the concept and technical solution of the utility model are directly applied to other occasions without improvement, they are all within the scope of protection of the utility model.
Claims
1. A deep-buried pipeline inspection well system suitable for use in water-rich quicksand formations, comprising: A deep-buried sewage pipe (1) and an inspection well (2), characterized in that a crossing pipe (9) is provided on the deep-buried sewage pipe (1) at the intersection with the inspection well (2), and both ends of the crossing pipe (9) are connected in series with the two deep-buried sewage pipes (1) through connecting ends (91), and both connecting ends (91) are fixed in the well wall of the inspection well (2); a plurality of inclined well wall reinforcement anchor rods (4) are fixedly installed on the outer wall of the inspection well (2), a bottom plate (3) is provided at the inner bottom of the inspection well (2), a plurality of inclined bottom plate locking anchor rods (5) are fixedly installed at the outer periphery of the bottom plate (3), and a bottom plate reinforcement anchor rod (6) and a grouting drainage pipe (7) are fixedly installed vertically under the bottom plate (3).
2. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 is characterized in that: The diameter of the crossing pipe (9) is larger than the diameter of the deep-buried sewage pipe (1), and the connecting end (91) is a transition connection structure with one end expanding outward and the other end contracting, wherein the expanded end is connected to one end of the crossing pipe (9) and the contracted end is connected to one end of the deep-buried sewage pipe (1).
3. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 is characterized in that: An inner lining steel support (92) is installed in the crossing section pipe (9), and the inner lining steel support (92) is a structure with an outer circle and an inner square.
4. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 is characterized in that: The plurality of well wall reinforcement anchor rods (4) are divided into at least two groups, and each group of well wall reinforcement anchor rods (4) comprises at least two anchor rods that are radially distributed on the outer wall of the inspection well (2).
5. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 or 4, characterized in that: The well wall reinforcement anchor rod (4) is a hollow structure, the length of which is the same as the diameter of the inspection well (2), and is installed at a 45° downward tilt along the radial side of the inspection well (2), the inner upper end of which is anchored to the outer wall of the inspection well (2), and the outer lower end of which is anchored in the soil outside the inspection well (2).
6. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 is characterized in that: The bottom plate locking anchor rod (5) is a hollow structure, its length is half the depth of the inspection well (2), and it is installed along the radial side of the inspection well (2) at a downward inclination of 45 degrees, its inner upper end is anchored to the bottom plate (3) of the inspection well (2), and its outer lower end is anchored in the soil outside the inspection well (2).
7. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 is characterized in that: The bottom plate reinforcement anchor rod (6) is a hollow structure, has a length the same as the diameter of the inspection well (2) and is vertically installed under the bottom plate (3), has an upper end anchored to the bottom plate (3), and has a lower end anchored in the soil below the inspection well (2).
8. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 is characterized in that: The lower end of the grouting drainage pipe (7) is buried in the soil below the inspection well (2), and the upper end thereof passes through the center of the bottom plate (3). The outer wall or inner wall of the grouting drainage pipe (7) located on the bottom plate (3) is provided with an external thread or an internal thread, and a nut or an inner plug is installed through the thread.
9. The deep-buried pipeline inspection well system suitable for water-rich quicksand formations according to claim 1 is characterized in that: A plurality of annular high-pressure rotary jet piles (8) evenly distributed in an annular shape are vertically arranged in the soil outside the inspection well (2), and the length of the piles is 150% of the depth of the inspection well (2).