Grouting method capable of controlling disturbance

Abstract

The invention relates to a grouting method capable of controlling disturbance, and relates to the technical field of geotechnical engineering grouting reinforcement, a steel floral tube grouting device is adopted in the construction method, the grouting device comprises a steel floral tube body, the steel floral tube body comprises an outer-layer steel floral tube and an inner-layer steel floral tube, the outer-layer steel floral tube serves as a mud discharging tube, and the inner-layer steel floral tube serves as a mud discharging tube. The inner-layer steel floral tube serves as a grouting tube and is used for injecting reinforcing grout into a stratum, an opening and closing connector is arranged at one end of the outer-layer steel floral tube and one end of the inner-layer steel floral tube, and the grouting connector is connected with the inner-layer steel floral tube through a small steel tube and can inject the grout in the inner-layer steel floral tube into a soil layer 18. According to the grouting device and method provided by the grouting method capable of controlling disturbance, the inner-layer steel floral tube is embedded in the original common grouting pipe, the corresponding opening and closing connector is arranged, original grout conveying equipment can still be adopted for grouting, the manufacturing process is simple, the cost is low, construction is convenient and fast, and universality is achieved.

Description

Technical Field

[0001] The present application relates to the technical field of grouting reinforcement of geotechnical engineering, and in particular to a grouting method with controllable disturbance. Background Art

[0002] Since the 1990s, my country's civil engineering construction has developed rapidly. Functionalization of civil engineering, three-dimensional urban construction, high-speed transportation, and improved comprehensive living conditions have become the characteristics of modern civil engineering construction in my country. Various civil engineering construction projects have put forward higher requirements for the foundation. In recent years, various foundation treatment methods have also been continuously improved and improved, which not only improves the work efficiency, but also effectively guarantees the construction quality.

[0003] At present, the methods for treating the foundation include drainage consolidation, lime-soil pile compaction, vibro-impact, dynamic tamping replacement, cement-soil mixing pile, chemical reinforcement, etc. However, various foundation treatment methods still cannot avoid causing excessive disturbance to the soil layer, resulting in deformation of the foundation soil, affecting construction safety, damaging surrounding pipelines, etc., and traditional grouting methods often find it difficult to effectively control the disturbance of the soil layer during the grouting process, and the mud and slurry are easily mixed, affecting the grouting effect and engineering safety. Although some double-layer tube grouting equipment has been available in the prior art, most of them have complex structures, are inconvenient to operate, and have limited control over grouting disturbances; Therefore, a grouting method with controllable disturbance is proposed to solve the above-mentioned related technical problems.

[0004] Application Contents In order to improve the above problems, the present application provides a grouting method with controllable disturbance.

[0005] The present application provides a grouting method with controllable disturbance, which adopts the following technical solution: A controllable disturbance grouting method, the construction method adopts a steel flower pipe grouting device, the grouting device comprises a steel flower pipe body, the steel flower pipe body comprises an outer steel flower pipe and an inner steel flower pipe, wherein the outer steel flower pipe is used as a mud discharge pipe, and the inner steel flower pipe is used as a grouting pipe for injecting reinforcement slurry into the stratum, the outer steel flower pipe and one end of the inner steel flower pipe are provided with an opening and closing joint, the opening and closing joint connects the outer steel flower pipe and the inner steel flower pipe, and an opening and closing device is provided on the opening and closing joint, the opening and closing joint can open and close and adjust the circulation of the outer steel flower pipe; the outer steel flower pipe and the inner steel flower pipe are welded with a plurality of small steel pipes at the connection; the outer steel flower pipe and the inner steel flower pipe are evenly provided with a plurality of mud discharge interfaces and grouting interfaces on the pipe body of the outer steel flower pipe, the mud discharge interface can discharge the soil layer mud outward through the outer steel flower pipe, the grouting interface is connected to the inner steel flower pipe through the small steel pipe, and the slurry in the inner steel flower pipe can be injected into the soil layer.

[0006] By adopting the above technical scheme, the steel flower pipe is provided with an inner and outer layer of pipelines, which are connected by an opening and closing joint. The outer layer of the steel flower pipe is a mud discharge pipe, and the inner layer of the steel flower pipe is a grouting pipe. The flow of the corresponding outer layer of the steel flower pipe can be opened and closed and adjusted by the opening and closing device. The opening and closing joint is installed on the steel flower pipe when in use.

[0007] Furthermore, the steel flower pipe is designed as a two-layer structure, namely an outer steel flower pipe and an inner steel flower pipe. The outer steel flower pipe serves as a mud discharge pipe and is mainly responsible for discharging mud and groundwater encountered during the grouting process; the inner steel flower pipe serves as a grouting pipe, which is used to inject reinforcement slurry into the formation. A certain gap is maintained between the outer steel flower pipe and the inner steel flower pipe to facilitate the flow and discharge of mud.

[0008] Furthermore, a plurality of mud discharge interfaces are evenly arranged on the surface of the outer steel flower pipe so as to discharge the soil layer mud outward through the outer steel flower pipe.

[0009] Furthermore, the outer steel flower pipe and the inner steel flower pipe are welded and connected at the connection point by using a small steel pipe, and the inner steel flower pipe is connected to the grouting interface through the small steel pipe, so that the slurry in the inner steel flower pipe passes through the small steel pipe and is injected into the formation through the grouting hole on the outer mud discharge pipe.

[0010] Furthermore, a soil pressure gauge is provided at one end of the outer steel flower pipe, which can monitor the soil pressure changes in real time, and the other end of the outer steel flower pipe is connected to an opening and closing joint and a pressure visualization instrument, wherein the opening and closing device on the opening and closing joint controls the opening and closing of the mud discharge pipe.

[0011] By adopting the above technical solution, during actual use, the soil pressure gauge transmits the data of soil pressure through the wire, and the wire is fixed on the inner steel flower pipe.

[0012] Furthermore, the opening and closing joint adjusts the flow state of the outer steel flower pipe through an opening and closing device. The opening and closing device can control the discharge speed and amount of mud in the outer steel flower pipe according to construction needs. At the same time, the opening and closing joint controls the pressure balance during the grouting process according to the pressure visualization instrument to ensure the smooth progress of the grouting process.

[0013] Furthermore, the inner steel flower pipe is a grouting pipe, and one end of the inner steel flower pipe is connected to the grouting interface on the outer steel flower pipe through a small steel pipe to inject grout into the soil layer. At the same time, the other end of the inner steel flower pipe is connected to a high-pressure grouting pump through the open and close joint. The high-pressure grouting pump can control the grouting pressure and grouting speed.

[0014] Furthermore, during the grouting construction process, the opening and closing of the mud discharge pipe can be controlled by the opening and closing device. According to the data of the soil pressure gauge, the opening and closing of the mud discharge pipe can be controlled to discharge excess mud while grouting.

[0015] Further, a grouting method with controlled disturbance comprises the following steps: Step 1: Select appropriate grouting materials and grouting parameters according to the actual situation of the project; and inspect and debug the double-layer steel flower pipe grouting device to ensure that all components are tightly connected without leakage, and the opening and closing joints are flexible and reliable; Step 2, determine the hole position in the area to be treated, and drill to a predetermined depth using a geological drill; Step 3, installing the opening and closing joint on the steel flower pipe, and connecting the slurry delivery pipe and the mud delivery pipe to the opening and closing joint and fixing them, and then placing the steel flower pipe grouting device, and sealing the hole with concrete to ensure that the hole does not leak during grouting; Step 4: During grouting reinforcement, the high-pressure grouting pump is turned on to inject slurry into the soil layer, and the pressure change of the soil layer is monitored by a pressure visualization instrument. When the soil layer pressure reaches a predetermined range, the slurry delivery pressure and slurry delivery speed are controlled. When the pressure exceeds the predetermined range, the mud discharge pipe is opened through the opening and closing device to discharge excess mud in the soil layer. When the pressure returns to the predetermined range, the mud discharge pipe is closed; Step 5: After the grouting is completed, pull out the steel pipe and proceed to the construction of the next hole.

[0016] The grouting device provided by the above technical solution can discharge excess mud in the soil layer during grouting according to the needs of the project, effectively control the soil layer pressure, prevent the grouting process from causing excessive disturbance to the soil layer, avoid excessive deformation of the foundation soil, and thus improve the safety of grouting construction and protect surrounding pipelines. The combination of these features makes the present invention not only have the advantages of high efficiency and cost saving in grouting construction, but also pays attention to the importance of construction safety and foundation protection, providing comprehensive technical support and guarantee for engineering construction.

[0017] In summary, the present application includes at least one of the following beneficial technical effects: Compared with the prior art, the grouting device and method provided by the controllable disturbance grouting method nest an inner steel flower pipe in the original ordinary grouting pipe and are equipped with corresponding opening and closing joints. The grouting can still use the original slurry conveying equipment, the manufacturing process is simple, the cost is low, the construction is convenient and it has universal applicability.

[0018] The device of the present application can discharge excess mud in the soil layer during grouting to control the soil layer pressure according to the needs of the project, avoid excessive disturbance of the soil layer by grouting, prevent excessive deformation of the foundation soil, thereby improving the safety of grouting construction and protecting surrounding pipelines. The combination of these features makes the present invention not only have the advantages of high efficiency and cost saving in grouting construction, but also pays attention to the importance of construction safety and foundation protection, providing comprehensive technical support and guarantee for engineering construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of a steel flower tube grouting device provided in an embodiment of the present invention.

[0020] Figure 2 Schematic diagram of an open and close joint provided in an embodiment of the present invention.

[0021] Figure 3 It is a schematic diagram of the grouting working conditions of the grouting method provided in an embodiment of the present invention.

[0022] Figure 4 It is a schematic diagram of the mud discharge working condition of the grouting method provided in an embodiment of the present invention.

[0023] In the figure: 1. Outer steel flower pipe; 2. Mud discharge interface; 3. Inner steel flower pipe; 4. Grouting interface; 5. Small steel pipe; 6. Soil pressure gauge; 7. Thread (A); 8. Thread (B); 9. Wire; 10. Thread (C); 11. Opening and closing device; 12. Pressure visualization instrument; 13. Thread (D); 14. Thread (E); 15. Thread (F); 16. Opening and closing joint; 17. Concrete; 18. Soil layer; 19. Slurry; 20. Mud. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0025] The following is combined with Figure 1-Figure 4 , further details of this application are given.

[0026] A controllable disturbance grouting method, the construction method adopts a steel flower pipe grouting device, the grouting device includes a steel flower pipe body, the steel flower pipe body includes an outer steel flower pipe 1 and an inner steel flower pipe 3, wherein the outer steel flower pipe 1 is used as a mud discharge pipe, and the inner steel flower pipe 3 is used as a grouting pipe for injecting reinforcement slurry 19 into the formation, and the outer steel flower pipe 1 and the inner steel flower pipe 3 are provided with an opening and closing joint 16 at one end, and the opening and closing joint 16 connects the outer steel flower pipe 1 and the inner steel flower pipe 3, and the opening and closing joint 16 is provided with an opening and closing device 11, and the opening and closing joint 16 can open and close and adjust the circulation of the outer steel flower pipe 1; the outer steel flower pipe 1 and the inner steel flower pipe 3 are welded with multiple small steel pipes 5 at the connection; the pipe body of the outer steel flower pipe 1 is evenly provided with multiple mud discharge interfaces 2 and grouting interfaces 4, the mud discharge interface 2 can discharge the soil layer mud 20 through the outer steel flower pipe 1 to the outside, and the grouting interface 4 is connected with the inner steel flower pipe 3 through the small steel pipe 5, and the slurry 19 in the inner steel flower pipe 3 can be injected into the soil layer 18.

[0027] By adopting the above technical solution, the steel flower pipe is provided with an inner and outer layer of pipelines, which are connected by an opening and closing joint 16. The outer steel flower pipe 1 is a mud discharge pipe, and the inner steel flower pipe 3 is a grouting pipe. The flow of the corresponding outer steel flower pipe 1 can be opened and closed and adjusted by the opening and closing device 11. When in use, the opening and closing joint 16 is installed on the steel flower pipe.

[0028] The steel flower pipe is designed as an inner and outer two-layer structure, namely an outer steel flower pipe 1 and an inner steel flower pipe 3. The outer steel flower pipe 1 serves as a mud discharge pipe and is mainly responsible for discharging the mud 20 and groundwater encountered during the grouting process; the inner steel flower pipe 3 serves as a grouting pipe, which is used to inject reinforcement slurry 19 into the formation. A certain gap is maintained between the outer steel flower pipe 1 and the inner steel flower pipe 3 to facilitate the flow and discharge of the mud 20.

[0029] The outer layer steel pipe 1 has multiple uniform mud discharge interfaces 2 that can discharge the soil layer mud 20 outward through the outer layer steel pipe 1 .

[0030] The outer steel flower pipe 1 and the inner steel flower pipe 3 are welded and connected at the connection point by a small steel pipe 5. The inner steel flower pipe 3 is connected to the grouting interface 4 through the small steel pipe 5, and the slurry 19 in the inner steel flower pipe 3 passes through the small steel pipe 5 and is injected into the formation through the grouting hole on the outer mud discharge pipe.

[0031] See also Figure 1 A soil pressure gauge 6 is provided at one end of the outer steel flower pipe 1, which can monitor the pressure changes of the soil layer 18 in real time, and the other end of the outer steel flower pipe 1 is connected to an opening and closing joint 16 and a pressure visualization instrument 12, wherein the opening and closing device 11 on the opening and closing joint 16 controls the opening and closing of the mud discharge pipe.

[0032] By adopting the above technical solution, during actual use, the soil pressure gauge 6 transmits the data of the soil layer 18 pressure through the wire 9, and the wire 9 is fixed on the inner steel flower pipe 3.

[0033] See also Figure 1 and Figure 2 As shown, the opening and closing joint 16 adjusts the flow state of the outer steel flower pipe 1 through the opening and closing device 11. The opening and closing device 11 can control the discharge speed and amount of the mud 20 in the outer steel flower pipe 1 according to the construction needs. At the same time, the opening and closing joint 16 controls the pressure balance during the grouting process according to the pressure visualization instrument 12 to ensure the smooth progress of the grouting process.

[0034] By adopting the above technical solution, the data of the soil pressure gauge 6 is transmitted to the pressure visualization instrument 12 via the wire 9 to monitor the changes in the pressure of the soil layer 18, and the opening and closing of the opening and closing device 11 is controlled and adjusted according to the pressure of the soil layer 18 according to the construction requirements, thereby reducing the disturbance of the soil layer 18 caused by grouting.

[0035] See also Figure 1-4 As shown, the inner steel flower pipe 3 is a grouting pipe, and one end of the inner steel flower pipe 3 is connected to the grouting interface 4 on the outer steel flower pipe 1 through a small steel pipe 5 to grout into the soil layer 18, and at the same time, the other end of the inner steel flower pipe 3 is connected to a high-pressure grouting pump through the open and close joint 16, and the high-pressure grouting pump can control the grouting pressure and grouting speed.

[0036] During the grouting construction process, the opening and closing of the mud discharge pipe can be controlled by the opening and closing device 11. According to the data of the soil pressure gauge 6, the opening and closing of the mud discharge pipe can be controlled to discharge excess mud 20 while grouting.

[0037] By adopting the above technical scheme, a thread (A) 7 is provided at the connection between the outer steel flower pipe 1 and the opening and closing joint 16, corresponding to the thread (E) 14 at the opening and closing joint 16, and a thread (C) 10 is provided on the opening and closing joint 16 for connecting to an external mud discharge pipe to transport the soil layer mud 20 to the mud pool; a thread (B) 8 is provided at the connection between the inner steel flower pipe 3 and the opening and closing joint 16, corresponding to the thread (F) 15 at the opening and closing joint 16, and a thread (D) 13 is provided on the opening and closing joint 16 for connecting to an external slurry 19 delivery pipe to transport the grouting slurry 1919 to the inner steel flower pipe 3.

[0038] A grouting method with controlled disturbance comprises the following steps: Step 1, select appropriate grouting materials and grouting parameters according to the actual situation of the project; and inspect and debug the double-layer steel flower pipe grouting device to ensure that all components are tightly connected without leakage, and the opening and closing joints 16 are flexible and reliable; Step 2, determine the hole position in the area to be treated, and drill to a predetermined depth using a geological drill; Step 3, install the opening and closing joint 16 on the steel flower pipe, connect the slurry 19 delivery pipe and the mud delivery pipe to the opening and closing joint 16 and fix them, then place the steel flower pipe grouting device, and seal the hole with concrete 17 to ensure that the hole does not leak during grouting; Step 4: During grouting reinforcement, the high-pressure grouting pump is turned on to inject slurry 19 into the soil layer 18, and the pressure change of the soil layer 18 is monitored by the pressure visualization instrument 12. When the pressure of the soil layer 18 reaches a predetermined range, the slurry 19 delivery pressure and the slurry 19 delivery speed are controlled. When the pressure exceeds the predetermined range, the mud discharge pipe is opened by the opening and closing device 11 to discharge the excess mud 20 in the soil layer 18. When the pressure returns to the predetermined range, the mud discharge pipe is closed; Step 5: After the grouting is completed, pull out the steel pipe and proceed to the construction of the next hole.

[0039] The working process of this application is as follows: select appropriate grouting materials and grouting parameters according to the actual situation of the project; and check and debug the double-layer steel flower pipe grouting device to ensure that each component is tightly connected without leakage, and the opening and closing joint 16 is flexible and reliable. Determine the hole position in the foundation treatment area, drill to a predetermined depth through a geological rotary machine, install the opening and closing joint 16 on the steel flower pipe, and connect the slurry 19 delivery pipe and the mud delivery pipe to the opening and closing joint 16 and fix them, and then place the steel flower pipe grouting device, and seal the hole with concrete 17 , to ensure that there is no leakage at the hole during grouting. During grouting reinforcement, turn on the high-pressure grouting pump, inject slurry 19 into the soil layer 18, and monitor the pressure change of the soil layer 18 through the pressure visualization instrument 12. When the pressure of the soil layer 18 reaches the predetermined range, control the slurry 19 delivery pressure and slurry 19 delivery speed. When the pressure exceeds the predetermined range, open the mud discharge pipe through the opening and closing device 11 to discharge excess mud 20 in the soil layer 18. When the pressure returns to the predetermined range, close the mud discharge pipe. After the grouting is completed, pull out the steel flower pipe and proceed to the construction of the next hole.

[0040] The embodiments of this specific implementation are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. The same components are represented by the same figure marks. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A grouting method with controlled disturbance, characterized in that: The construction method adopts a steel flower pipe grouting device, which comprises a steel flower pipe body, wherein the steel flower pipe body comprises an outer steel flower pipe and an inner steel flower pipe, wherein the outer steel flower pipe is used as a mud discharge pipe, and the inner steel flower pipe is used as a grouting pipe for injecting reinforcement slurry into the stratum, and an opening and closing joint is arranged at one end of the outer steel flower pipe and the inner steel flower pipe, and the opening and closing joint connects the outer steel flower pipe and the inner steel flower pipe, and an opening and closing device is arranged on the opening and closing joint, and the opening and closing joint can open and close and adjust the circulation of the outer steel flower pipe; a plurality of small steel pipes are welded at the connection between the outer steel flower pipe and the inner steel flower pipe; a plurality of mud discharge interfaces and grouting interfaces are evenly arranged on the pipe body of the outer steel flower pipe, and the mud discharge interface can discharge the mud of the soil layer outward through the outer steel flower pipe, and the grouting interface is connected to the inner steel flower pipe through the small steel pipe, and the slurry in the inner steel flower pipe can be injected into the soil layer.

2. A grouting method with controlled disturbance according to claim 1, characterized in that: The steel flower pipe is designed as a two-layer structure, namely an outer steel flower pipe and an inner steel flower pipe. The outer steel flower pipe serves as a mud discharge pipe and is mainly responsible for discharging the mud and groundwater encountered during the grouting process; the inner steel flower pipe serves as a grouting pipe, which is used to inject reinforcement slurry into the formation. A certain gap is maintained between the outer steel flower pipe and the inner steel flower pipe to facilitate the flow and discharge of mud.

3. A grouting method with controlled disturbance according to claim 1, characterized in that: A plurality of mud discharge interfaces are evenly arranged on the surface of the outer steel flower pipe so as to discharge the soil layer mud outward through the outer steel flower pipe.

4. The grouting method with controlled disturbance according to claim 1, characterized in that: The outer steel flower pipe and the inner steel flower pipe are welded and connected at the connection point by using a small steel pipe. The inner steel flower pipe is connected to the grouting interface through the small steel pipe, and the slurry in the inner steel flower pipe passes through the small steel pipe and is injected into the formation through the grouting hole on the outer mud discharge pipe.

5. The grouting method with controlled disturbance according to claim 1, characterized in that: A soil pressure gauge is provided at one end of the outer steel pipe, which can monitor the soil pressure changes in real time, and the other end of the outer steel pipe is connected to an opening and closing joint and a pressure visualization instrument, wherein the opening and closing device on the opening and closing joint controls the opening and closing of the mud discharge pipe.

6. The grouting method with controlled disturbance according to claim 1, characterized in that: The opening and closing joint adjusts the flow state of the outer steel pipe through the opening and closing device. The opening and closing device can control the discharge speed and amount of mud in the outer steel pipe according to construction needs. At the same time, the opening and closing joint controls the pressure balance during the grouting process according to the pressure visualization instrument to ensure the smooth progress of the grouting process.

7. The grouting method with controlled disturbance according to claim 1, characterized in that: The inner steel flower pipe is a grouting pipe, and one end of the inner steel flower pipe is connected to the grouting interface on the outer steel flower pipe through a small steel pipe to inject grout into the soil layer. At the same time, the other end of the inner steel flower pipe is connected to a high-pressure grouting pump through the open and close joint. The high-pressure grouting pump can control the grouting pressure and grouting speed.

8. The grouting method with controlled disturbance according to claim 1, characterized in that: During the grouting construction process, the opening and closing of the mud discharge pipe can be controlled by the opening and closing device. According to the data of the soil pressure gauge, the opening and closing of the mud discharge pipe can be controlled to discharge excess mud while grouting.

9. A grouting method with controlled disturbance according to any one of claims 1 to 8, comprising the following steps: Step 1: Select appropriate grouting materials and grouting parameters according to the actual situation of the project; and inspect and debug the double-layer steel flower pipe grouting device to ensure that all components are tightly connected without leakage, and the opening and closing joints are flexible and reliable; Step 2, determine the hole position in the area to be treated, and drill to a predetermined depth using a geological drill; Step 3, installing the opening and closing joint on the steel flower pipe, and connecting the slurry delivery pipe and the mud delivery pipe to the opening and closing joint and fixing them, and then placing the steel flower pipe grouting device, and sealing the hole with concrete to ensure that the hole does not leak during grouting; Step 4: During grouting reinforcement, the high-pressure grouting pump is turned on to inject slurry into the soil layer, and the pressure change of the soil layer is monitored by a pressure visualization instrument. When the soil layer pressure reaches a predetermined range, the slurry delivery pressure and slurry delivery speed are controlled. When the pressure exceeds the predetermined range, the mud discharge pipe is opened through the opening and closing device to discharge excess mud in the soil layer. When the pressure returns to the predetermined range, the mud discharge pipe is closed; Step 5: After the grouting is completed, pull out the steel pipe and proceed to the construction of the next hole.

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