Earth pressure gauge embedding structure for short pipe replacement construction

Abstract

The utility model relates to a soil pressure gauge embedding structure for short pipe replacement construction, which comprises a probe hole arranged at the top and the side edge of a pipeline, a paddle binding bag arranged at the bottom of the probe hole, slurry in a soft plastic state filled in the paddle binding bag, and a soil pressure gauge arranged in the paddle binding bag and perpendicular to the radial direction of the pipeline. The soil pressure gauges in the probe holes right above the pipeline are horizontally arranged, and the soil pressure gauges in the probe holes on the two sides of the pipeline are laterally arranged, so that the formation pressure change can be effectively conducted to the soil pressure gauges, and the accuracy of monitoring results of the soil pressure gauges is ensured; the bottom of the water pumping pipe is wrapped with geotechnical cloth to prevent the sand from entering the water pumping pipe and blocking the water pumping pipe; the top of the water pumping hole is backfilled with clay to prevent surface water from entering a soil layer around the pipeline through the water pumping hole; the bearing capacity of the soil layer is reduced; and the pipeline structure safety is influenced.

Description

Technical Field

[0001] The utility model relates to the non-excavation replacement construction of underground pipelines, in particular to a soil pressure gauge embedding structure for short pipe replacement construction. Background Art

[0002] As a non-destructive repair method, the non-excavation replacement construction of underground pipelines is widely used in the repair construction of urban pipelines. During construction, the original pipeline is broken by an extrusion gun head and squeezed into the surrounding soil, and at the same time, a new pipeline is pushed in. For areas adjacent to underground structures or with complex pipeline layouts, the extrusion force generated during construction may affect the safety of existing structures. However, due to the large burial depth of the pipeline, it is impossible to effectively monitor the underground conditions, and usually, it can only be discovered after the existing structure is damaged. A soil pressure gauge is a simple and reliable monitoring sensor. After being buried in the soil, it can effectively monitor the soil pressure of the formation. However, it needs to be buried in the formation in advance and needs to be covered densely, otherwise, it will affect the accuracy of the monitoring data. Summary of the Utility Model

[0003] The purpose of the utility model is to propose a soil pressure gauge embedding structure for short pipe replacement construction in view of the problems existing in the existing non-excavation short pipe replacement construction. To achieve the above purpose, the utility model adopts the following technical solutions:

[0004] The soil pressure gauge embedding structure for short pipe replacement construction involved in the utility model includes exploration holes opened at the top and side of the pipeline. A slurry bag is placed at the bottom of the exploration hole, and slurry is poured into the slurry bag. The soil pressure gauge is arranged in the slurry bag. The exploration hole is filled with sand and gravel and tamped with water. A water extraction pipe is inserted into the exploration hole, and the water poured into the exploration hole is discharged through the water extraction pipe to accelerate the consolidation of the backfilled sand and gravel. The bottom of the water extraction pipe is wrapped with geotextile to prevent sand and gravel from entering the water extraction pipe and blocking it. The top of the exploration hole is backfilled with clay to prevent surface water from entering the soil layer around the pipeline through the exploration hole and reducing the bearing capacity of the soil layer, which affects the safety of the pipeline structure.

[0005] Preferably, the slurry in the slurry bag is in a soft plastic state, which not only avoids the problem that the slurry with too low water content cannot wrap the soil pressure gauge in it, but also avoids the problem that the slurry with too high water content cannot transmit the change of formation pressure to the soil pressure gauge.

[0006] Preferably, a data line and a traction rope are arranged on the soil pressure gauge. The data line and the traction rope extend from the top of the exploration hole to the ground; the soil pressure gauge is perpendicular to the radial direction of the pipeline. The soil pressure gauge in the exploration hole directly above the pipeline is horizontally arranged, and the traction rope is tied to the back of the soil pressure gauge. The soil pressure gauges in the exploration holes on both sides of the pipeline are laterally arranged, and the traction rope is tied to the side of the soil pressure gauge; since the fragments of the pipeline mainly move along the radial direction of the pipeline when the pipeline is squeezed and broken, therefore, the soil pressure gauge is arranged perpendicular to the radial direction of the pipeline to effectively monitor the change of soil pressure in the formation.

[0007] Preferably, the diameter of the beam grouting bladder after grouting is greater than or equal to the diameter of the exploration hole, so as to prevent the beam grouting bladder from rotating in the exploration hole when it is placed in the exploration holes on both sides of the pipeline together with the earth pressure gauge, thus failing to ensure that the earth pressure gauge is placed perpendicular to the radial direction of the pipeline, and consequently unable to effectively monitor the change of the formation earth pressure.

[0008] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0009] 1. The earth pressure gauge is implanted around the pipeline through the exploration hole, and the diameter of the exploration hole is small, reducing the impact of construction activities on the bottom surface.

[0010] 2. The sand and gravel backfilled in the exploration hole are tamped by filling with water, and a water extraction pipe is set to extract the water poured into the exploration hole, accelerating the settlement and consolidation of the sand and gravel, and ensuring the compactness of the exploration hole backfill.

[0011] 3. The earth pressure gauge is wrapped in the beam grouting bladder, and soft plastic state cement slurry is injected into the beam grouting bladder, which can effectively conduct the change of the formation pressure to the earth pressure gauge, ensuring the correctness of the monitoring result of the earth pressure gauge.

[0012] 4. The earth pressure gauge placed in the exploration hole is set perpendicular to the radial direction of the pipeline, avoiding the situation where it is parallel to the radial direction of the pipeline and unable to effectively monitor the earth pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is the longitudinal sectional view of the earth pressure gauge embedding;

[0014] Figure 2 is the cross-sectional view of the earth pressure gauge embedding;

[0015] Figure 3 is the large-scale sectional view of the horizontal embedding structure of the earth pressure gauge ( Figure 2 Node A in it);

[0016] Figure 4 is the large-scale sectional view of the lateral embedding structure of the earth pressure gauge ( Figure 2 Node B in it);

[0017] Figure 5 is the longitudinal sectional view of the short pipe replacement construction;

[0018] Figure 6 is the cross-sectional view of the short pipe replacement construction.

[0019] Marking in the figure: 11 - earth pressure gauge, 12 - data line, 13 - towing rope, 21 - beam grouting bladder, 22 - slurry, 31 - exploration hole, 32 - clay, 33 - sand and gravel, 34 - water extraction pipe, 41 - ground surface, 42 - original pipeline, 43 - pipeline fragment, 44 - new pipeline, 45 - extrusion gun head. DETAILED DESCRIPTION OF THE INVENTION

[0020] To deepen the understanding of the present utility model, the following will refer to the appended Figure 1 to the appended Figure 6 to make a detailed description of the embodiments of the present utility model. The following embodiments are implemented on the premise of the technical solution of the present utility model, and the detailed implementation manners are given, but the protection scope of the present utility model is not limited to the following embodiments.

[0021] As shown in the appended Figure 1 and 2 , the earth pressure gauge embedding structure for short pipe replacement construction involved in the present utility model includes exploration holes 31 opened at the top and side of the pipeline. A beam grouting bag 21 is placed at the bottom of the exploration hole 31, and slurry 22 is poured into the beam grouting bag 21. The earth pressure gauge 11 is arranged in the beam grouting bag 21. The slurry 22 in the beam grouting bag 21 is in a soft plastic state, which not only avoids the problem that the slurry 22 cannot wrap the earth pressure gauge 11 due to too low water content, but also avoids the problem that the slurry 22 cannot transmit the change of formation pressure to the earth pressure gauge 11 due to too high water content. The exploration hole 31 is filled with sand and gravel 33 and tamped with water. A water extraction pipe 34 is inserted into the exploration hole 31, and the water poured into the exploration hole 31 is discharged through the water extraction pipe 34 to accelerate the consolidation of the backfilled sand and gravel 33. The bottom of the water extraction pipe 34 is wrapped with geotextile to prevent sand and gravel 33 from entering the water extraction pipe 34 and blocking the water extraction pipe 34. The exploration hole 31 is backfilled with clay 32 at the top to prevent surface water from entering the soil layer around the pipeline through the exploration hole 31, reducing the bearing capacity of the soil layer and affecting the safety of the pipeline structure.

[0022] As shown in the appended Figure 3 and 4 , a data line 12 and a traction rope 13 are provided on the earth pressure gauge 11, and the data line 12 and the traction rope 13 extend from the top of the exploration hole 31 to the ground 41; the earth pressure gauge 11 is perpendicular to the radial direction of the pipeline. The earth pressure gauge 11 in the exploration hole 31 directly above the pipeline is horizontally arranged, and the traction rope 13 is tied to the back of the earth pressure gauge 11. The earth pressure gauges 11 in the exploration holes 31 on both sides of the pipeline are laterally arranged, and the traction rope 13 is tied to the side of the earth pressure gauge 11; since when the pipeline is crushed by extrusion, its fragments mainly move along the radial direction of the pipeline, therefore, the earth pressure gauge 11 is arranged perpendicular to the radial direction of the pipeline to effectively monitor the change of formation earth pressure. The diameter of the beam grouting bag 21 after grouting is greater than or equal to the diameter of the exploration hole 31 to avoid the beam grouting bag 21 and the earth pressure gauge 11 rotating in the exploration hole 31 when placed in the exploration holes 31 on both sides of the pipeline, so that it is impossible to ensure that the earth pressure gauge 11 is placed perpendicular to the radial direction of the pipeline, and thus it is impossible to effectively monitor the change of formation earth pressure.

[0023] As shown in the appended Figure 5 and 6As shown in the figure, boreholes 31 are drilled into the top and sides of the original pipeline 42 on the ground 41, and the earth pressure gauges 11 wrapped by the beam paddle bags 21 are implanted. Then, the original pipeline 42 is extruded into pipeline fragments 43 by the extrusion gun head 45 and pressed into the new pipeline 44. The pipeline fragments 43 are radially extruded into the surrounding soil layer by the extrusion gun head 45, and the soil layer further extrudes the earth pressure gauges 11 in the beam paddle bags 21. The earth pressure gauges 11 monitor the pressure changes for the reference of construction workers.

[0024] The above has described the present utility model in detail in conjunction with the embodiments, but the content described is only the preferred embodiment of the present utility model and cannot be considered as limiting the scope of implementation of the present utility model. All equivalent changes and improvements made within the scope of the application of the present utility model should still fall within the scope covered by the patent of the present utility model.

Claims

1. The buried structure of the earth pressure gauge for the short pipe replacement construction, characterized in that, It includes inspection holes (31) opened at the top and side of the pipeline. A bundled slurry bag (21) is placed at the bottom of the inspection hole (31), and slurry (22) is poured into the bundled slurry bag (21). An earth pressure gauge (11) is arranged inside the bundled slurry bag (21). The inspection hole (31) is filled with sand and gravel (33) and tamped after filling with water. A water extraction pipe (34) is inserted into the inspection hole (31), and the water poured into the inspection hole (31) is discharged through the water extraction pipe (34) to accelerate the consolidation of the backfilled sand and gravel (33). The bottom of the water extraction pipe (34) is wrapped with geotextile, and the top of the inspection hole (31) is backfilled with clay (32).

2. The earth pressure gauge embedding structure for short pipe replacement construction according to claim 1, characterized in that, The slurry (22) inside the bundled slurry bag (21) is in a soft plastic state.

3. The earth pressure gauge embedding structure for short pipe replacement construction according to claim 1, characterized in that The earth pressure gauge (11) is provided with a data line (12) and a traction rope (13). The data line (12) and the traction rope (13) extend from the top of the inspection hole (31) to the ground (41); the earth pressure gauge (11) is perpendicular to the radial direction of the pipeline. The earth pressure gauge (11) inside the inspection hole (31) directly above the pipeline is horizontally arranged, and the traction rope (13) is tied to the back of the earth pressure gauge (11). The earth pressure gauges (11) inside the inspection holes (31) on both sides of the pipeline are laterally arranged, and the traction rope (13) is tied to the side of the earth pressure gauge (11).

4. The soil pressure gauge embedding structure for short pipe replacement construction according to claim 1, characterized in that, The diameter of the bundled slurry bag (21) after grouting is greater than or equal to the diameter of the inspection hole (31).

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