Shield tunnel buried pipe grouting system and method

Abstract

The present invention discloses a shield tunnel buried pipe grouting system and method, the device includes a ball valve and a hydraulic buried pipe grouting kit, the hydraulic buried pipe grouting kit includes a hydraulic drive mechanism, a first check valve is installed in the sleeve valve pipe, and a second check valve is arranged in the pipe segment hoisting hole; the method includes step one, installing the ball valve; step two, fixing the hydraulic drive mechanism; step three, determining the length of the sleeve valve pipe and fixing the sleeve valve pipe; step four, burying the sleeve valve pipe; step five, removing the hydraulic drive mechanism; step six, grouting reinforcement. The present invention uses a hydraulic buried pipe grouting kit to bury the sleeve valve pipe, and check valves are arranged in the pipe segment hoisting hole and the sleeve valve pipe. When burying the sleeve valve pipe, a multiple sealing system can be formed to ensure that the entire buried process of the sleeve valve pipe is in a sealed state to avoid gushing disasters. The hydraulic buried pipe grouting kit does not damage the sleeve valve pipe, can reduce the investment of labor costs, effectively reduce construction costs, and improve construction efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of tunnel construction, and in particular relates to a shield tunnel pipe embedding grouting system and method. Background Art

[0002] The existing post-reinforcement grouting process for formed tunnel segments is pressure-type grouting and buried pipe grouting: the pressure-type grouting uses a grouting head to connect the segment hoisting hole, then opens the grouting head ball valve, uses an impact drill to drill through the 5cm plain concrete segment behind the segment hoisting hole, and then connects the grouting machine grouting pipeline for pressure-type grouting. In soft formations, gushing is prone to occur when opening holes, and the grouting slurry fills irregularly after entering the segment wall, the depth is shallow, and the diffusion depth from the outer surface of the segment to the soil is insufficient, which has a poor overall reinforcement effect on the formation; buried pipe grouting uses sleeve valve pipe grouting, but the formations that need to be reinforced are basically poor in geology, with high water content in the formation, and low efficiency and high cost of buried pipes. Uncontrollable conditions such as gushing are prone to occur when burying pipes, and the sleeve valve pipes are easily damaged during the buried pipe process. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a shield tunnel pipe grouting system in view of the deficiencies in the above-mentioned prior art. The system has a simple structure and a convenient and efficient operation method. The sleeve valve pipe is buried by adopting a hydraulic pipe grouting kit. At the same time, check valves are arranged in the pipe segment lifting hole and the sleeve valve pipe. When the sleeve valve pipe is buried, a multiple sealing system can be formed to ensure that the entire burying process of the sleeve valve pipe is in a sealed state to avoid gushing disasters. The sleeve valve pipe is buried by adopting a hydraulic pipe grouting kit without damaging the sleeve valve pipe. Moreover, one pipe grouting system is equipped with two construction personnel to complete the pipe burying operation, which can greatly reduce the investment in labor costs, thereby effectively reducing construction costs and improving construction efficiency.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a shield tunnel buried pipe grouting system, characterized in that: it includes a ball valve installed at the upper end of the pipe segment lifting hole, the upper end of the ball valve is installed with a hydraulic buried pipe grouting kit for burying a sleeve valve pipe, the hydraulic buried pipe grouting kit includes a hydraulic drive mechanism, the sleeve valve pipe is an assembled sleeve valve pipe spliced ​​by a bottom sleeve valve pipe section and one or more spliced ​​sleeve valve pipe sections, the bottom sleeve valve pipe section and the spliced ​​sleeve valve pipe section are both installed with a first check valve, and the hydraulic drive mechanism is installed on the fixed base through The upper end of the ball valve, the fixed base includes a circular base, the outer ring of the base is provided with a plurality of clips for fixing the hydraulic drive mechanism along its circumference, the upper end of the hydraulic drive mechanism is provided with a conical clamp which cooperates with it and is used to fix the sleeve valve tube, the bottom sleeve valve tube section at the lower end of the sleeve valve tube is driven by the hydraulic drive mechanism and passes through the ball valve and the pipe segment lifting hole from top to bottom in sequence and then inserted into the formation, a second check valve is provided in the pipe segment lifting hole, the ball valve and the pipe segment lifting hole are threadedly connected by a threaded joint, and the ball valve and the fixed base are threadedly connected.

[0005] The above-mentioned shield tunnel buried pipe grouting system is characterized in that: the lower end of the bottom sleeve valve pipe section is provided with a conical tip, and a plurality of slurry diffusion holes are opened on the pipe wall of the bottom sleeve valve pipe section and the pipe wall of the spliced ​​sleeve valve pipe section.

[0006] The above-mentioned shield tunnel buried pipe grouting system is characterized in that: the upper end interface and the lower end interface of the ball valve are both provided with internal threads matching with the threaded joint, one end of the threaded joint is threadedly connected to the lower end interface of the ball valve, and the other end of the threaded joint is screwed into the pipe segment lifting hole.

[0007] The above-mentioned shield tunnel buried pipe grouting system is characterized in that the threaded joint and the pipe segment lifting hole are coaxially arranged, and a sleeve valve pipe through hole is opened in the middle part of the threaded joint along its axial direction.

[0008] The above-mentioned shield tunnel buried pipe grouting system is characterized in that: a threaded connection column matching the internal thread at the upper end interface of the ball valve is provided at the lower end of the base.

[0009] The above-mentioned shield tunnel buried pipe grouting system is characterized in that the base and the threaded connecting column are coaxially arranged with the pipe segment lifting hole, and the center of the base and the threaded connecting column is provided with a through hole along its axial direction for the sleeve valve pipe to pass through.

[0010] The above-mentioned shield tunnel buried pipe grouting system is characterized in that: the hydraulic drive mechanism is a through-core cylinder, and an anchor clamp for fixing the sleeve valve pipe is provided on the through-core sleeve in the through-core cylinder.

[0011] At the same time, the present invention also discloses a shield tunnel buried pipe grouting method with simple method steps, characterized in that the method comprises the following steps:

[0012] Step 1, install the ball valve: install a second check valve in the segment hoisting hole, install the ball valve on the upper part of the segment hoisting hole through a threaded joint, the threaded joint is coaxially arranged with the segment hoisting hole and a sleeve valve pipe through hole is opened in the middle along its axial direction, internal threads are provided at both ends of the ball valve, the upper end of the threaded joint is threadedly connected to the lower end of the ball valve, and the lower end of the threaded joint is screwed into the segment hoisting hole from top to bottom;

[0013] Step 2: Fix the hydraulic drive mechanism. The process is as follows:

[0014] Step 201, installing the fixed base: the fixed base is threadedly connected to the ball valve, the lower end of the base is provided with a threaded connection column matched with the internal thread at the upper end interface of the ball valve, the threaded connection column is threadedly connected to the upper end interface of the ball valve, the base and the threaded connection column are coaxially arranged with the pipe segment lifting hole, and the center of the base and the threaded connection column is provided with a through hole along the axial direction thereof for the sleeve valve pipe to pass through;

[0015] Step 202, installing the hydraulic drive mechanism: the hydraulic drive mechanism is a through-core oil cylinder, multiple buckles are opened outward and downward, and the through-core oil cylinder is placed directly above the base, and the hydraulic drive mechanism and the base are coaxially arranged;

[0016] Step 203, clamping the hydraulic drive mechanism: closing the multiple buckles upward and inward, and clamping and fixing the hydraulic drive mechanism on the base through the multiple buckles;

[0017] Step 3: Determine the length of the sleeve valve tube and fix the sleeve valve tube. The process is as follows:

[0018] Step 301, determine the length of the sleeve valve pipe: determine the designed depth of the lower end of the sleeve valve pipe extending into the formation according to the grouting depth of the grouting soil body, determine the length of the sleeve valve pipe according to the designed depth of the lower end of the sleeve valve pipe extending into the formation and the depth of the pipe segment lifting hole, ensure that when the lower end of the sleeve valve pipe extends into the designed depth of the formation, the upper end of the sleeve valve pipe is located in the ball valve, and connect one or more spliced ​​sleeve valve pipe sections to the bottom sleeve valve pipe section according to the determined length of the sleeve valve pipe to form a sleeve valve pipe;

[0019] Step 302, fixing the sleeve valve tube: after passing one end of the sleeve valve tube section close to the bottom of the sleeve valve tube through the through-hole sleeve of the hydraulic drive mechanism from top to bottom, a conical clamp cooperating with the sleeve valve tube is installed at the upper end of the hydraulic drive mechanism to fix the sleeve valve tube, when the piston body of the hydraulic drive mechanism is extended, the conical clamp is in a loose state, and when the piston body of the hydraulic drive mechanism is retracted, the conical clamp is in a clamped state;

[0020] Step 4: bury the sleeve valve pipe. First, open the ball valve to connect the ball valve with the pipe segment hoisting hole. Then, bury the sleeve valve pipe in the formation through the reciprocating telescopic hydraulic drive mechanism of the hydraulic pump station.

[0021] When the piston body of the hydraulic drive mechanism extends, the through-hole sleeve fixed inside the piston body of the hydraulic drive mechanism moves together with the piston body, the anchor clamp at one end of the through-hole sleeve of the hydraulic drive mechanism clamps the sleeve valve tube, the conical clamp releases the sleeve valve tube, and the sleeve valve tube moves downward a specified distance under the action of the hydraulic drive mechanism;

[0022] When the piston body of the hydraulic drive mechanism retracts and resets, the conical clamp clamps the sleeve valve tube, the anchor clamp at one end of the through-hole of the hydraulic drive mechanism loosens the sleeve valve tube, and the piston body of the hydraulic drive mechanism retracts and resets upward;

[0023] Step 5: Remove the hydraulic drive mechanism: remove the fixed base, hydraulic drive mechanism and conical clamp on the ball valve;

[0024] Step 6: Grouting reinforcement: Connect the grouting pipe to the upper interface of the ball valve and start grouting. After the grouting is completed, close the ball valve and remove the grouting pipe.

[0025] The above-mentioned shield tunnel pipe grouting method is characterized in that: in step four, when the piston body of the hydraulic drive mechanism retracts and resets, the upper end of the sleeve valve tube is lower than the lower surface of the anchor clamp in the hydraulic drive mechanism, the conical clamp is first removed, and at the same time, a jacking pipe with the same outer diameter as the sleeve valve tube is installed in the through sleeve of the hydraulic drive mechanism, and the lower end of the jacking pipe is arranged close to the upper end of the sleeve valve tube. The conical clamp is reinstalled on the upper end of the hydraulic drive mechanism, and the hydraulic drive mechanism is extended and retracted by the hydraulic pump station to move the jacking pipe downward. The sleeve valve tube continues to extend downward into the formation under the action of the jacking pipe until the upper end of the sleeve valve tube is located in the ball valve, and then the jacking pipe is removed.

[0026] Compared with the prior art, the present invention has the following advantages:

[0027] 1. The shield tunnel buried pipe grouting system adopted by the present invention can seal the segment hoisting hole by installing a ball valve on the segment hoisting hole, thereby preventing leakage of grout from the segment hoisting hole and effectively improving construction quality and efficiency.

[0028] 2. The shield tunnel pipe grouting system adopted by the present invention forms an assembled sleeve valve pipe with a check valve in the middle by splicing together a bottom sleeve valve pipe section and one or more spliced ​​sleeve valve pipe sections. Both the bottom sleeve valve pipe section and the spliced ​​sleeve valve pipe section are round pipes. The length of the spliced ​​sleeve valve pipe section can be adaptively adjusted according to the thickness of the pipe segment, and has a wide range of applications. At the same time, the check valve can ensure that the sleeve valve pipe is always in a sealed state during the insertion process, thereby preventing gushing during the pipe burial process in formations with high water content, and can effectively improve the burial efficiency and quality of the sleeve valve pipe.

[0029] 3. The shield tunnel pipe grouting system adopted by the present invention installs a fixed base on the ball valve, and installs a hydraulic drive mechanism on the fixed base to bury the sleeve valve pipe. The upper end of the hydraulic drive mechanism is installed with a conical clamp that cooperates with it and is used to clamp the sleeve valve pipe. The sleeve valve pipe can be buried quickly, thereby effectively improving the efficiency of burying the sleeve valve pipe. At the same time, due to the mutual cooperation between the hydraulic drive mechanism and the conical clamp, the possibility of damage to the sleeve valve pipe can be reduced, thereby reducing the construction cost. During construction, only two construction workers are needed to complete the pipe burying operation, which can effectively reduce the labor intensity of the construction workers and reduce the investment in manpower costs.

[0030] 4. The shield tunnel buried pipe grouting system adopted by the present invention connects the ball valve and the pipe segment lifting hole through a threaded joint, and at the same time makes the ball valve and the fixed base threadedly connected, which is easy to install and disassemble, can improve construction efficiency, and is convenient for turnover use.

[0031] 5. The method adopted by the present invention determines the length of the sleeve valve tube by the thickness of the pipe segment and the designed depth of the lower end of the sleeve valve tube extending into the formation, and at the same time sets the stroke and reciprocating times of the hydraulic drive mechanism according to the length of the sleeve valve tube. This can quickly and accurately carry out pipe burial construction, improve the degree of automation of grouting pipe burial, and thus improve the efficiency of pipe burial. At the same time, it can reduce the labor intensity of construction personnel and reduce the investment in labor costs.

[0032] 6. The method adopted by the present invention is to bury the sleeve valve pipe through the reciprocating telescopic hydraulic drive mechanism of the hydraulic pump station. The operating speed of the hydraulic drive mechanism can be flexibly adjusted according to the situation, so that the sleeve valve pipe can be gradually buried in the soil layer, which can effectively protect the sleeve valve pipe from damage.

[0033] To sum up, the present invention has a simple structure and a convenient and efficient operation method. The sleeve valve pipe is buried by adopting a hydraulic pipe burial grouting kit. At the same time, check valves are arranged in the pipe segment lifting hole and the sleeve valve pipe. When the sleeve valve pipe is buried, a multiple sealing system can be formed to ensure that the entire burial process of the sleeve valve pipe is in a sealed state to avoid gushing disasters. The sleeve valve pipe is buried by adopting a hydraulic pipe burial grouting kit without damaging the sleeve valve pipe. Moreover, one pipe burial grouting system is equipped with two construction workers to complete the pipe burial operation, which can greatly reduce the investment in labor costs, thereby effectively reducing construction costs and improving construction efficiency.

[0034] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic structural diagram of the shield tunnel buried pipe grouting system adopted in the present invention.

[0036] Figure 2 It is a structural schematic diagram of the sleeve valve tube of the present invention.

[0037] Figure 3 It is a structural schematic diagram of the fixed base of the present invention.

[0038] Figure 4 It is a flowchart of the method of the present invention.

[0039] Description of reference numerals:

[0040] DETAILED DESCRIPTION

[0041] like Figure 1 , Figure 2 and Figure 3A shield tunnel buried pipe grouting system shown in the figure includes a ball valve 2 installed at the upper end of the pipe segment lifting hole, the upper end of the ball valve 2 is installed with a hydraulic buried pipe grouting kit for burying a sleeve valve pipe, the hydraulic buried pipe grouting kit includes a hydraulic drive mechanism 5, the sleeve valve pipe is an assembled sleeve valve pipe spliced ​​by a bottom sleeve valve pipe section 3 and one or more spliced ​​sleeve valve pipe sections 4, the bottom sleeve valve pipe section 3 and the spliced ​​sleeve valve pipe section 4 are both installed with a first check valve 7, the hydraulic drive mechanism 5 is installed at the upper end of the ball valve 2 through a fixed base 6, and the fixed base 6 includes a circular A base 6-1, wherein the outer ring of the base 6-1 is provided with a plurality of buckles 6-2 for fixing the hydraulic drive mechanism 5 along its circumference, and the upper end of the hydraulic drive mechanism 5 is provided with a conical clamp 9 which cooperates with it and is used to fix the sleeve valve tube, and the bottom sleeve valve tube section 3 at the lower end of the sleeve valve tube is driven by the hydraulic drive mechanism 5 and passes through the ball valve 2 and the pipe segment lifting hole from top to bottom in sequence and then inserted into the formation, and a second check valve 10 is provided in the pipe segment lifting hole, and the ball valve 2 is threadedly connected to the pipe segment lifting hole through a threaded joint 8, and the ball valve 2 is threadedly connected to the fixed base 6.

[0042] In actual use, an annular sealing ring is installed between the ball valve 2 and the threaded joint 8. The outer diameter of the sealing ring is consistent with the inner diameter of the internal threaded hole at the lower end interface of the ball valve 2. The inner diameter of the sealing ring is 1 mm smaller than the sleeve valve tube. By installing the ball valve 2 on the pipe segment lifting hole, the pipe segment lifting hole can be sealed by controlling the closing of the ball valve 2, thereby avoiding leakage of slurry from the pipe segment lifting hole, which can effectively improve the construction quality and efficiency.

[0043] In this embodiment, there are multiple spliced ​​sleeve valve pipe sections 4. By splicing the bottom sleeve valve pipe section 3 and multiple spliced ​​sleeve valve pipe sections 4 together, an assembled sleeve valve pipe with a first check valve 7 in the middle is formed. The bottom sleeve valve pipe section 3 and the spliced ​​sleeve valve pipe section 4 are both round tubes. The length of the spliced ​​sleeve valve pipe section 4 can be adaptively adjusted according to the thickness of the pipe segment 1, and has a wide range of applications. At the same time, the first check valve 7 can ensure that the sleeve valve pipe is always in a sealed state during the insertion process, thereby preventing gushing from occurring during the pipe burial process in formations with a high water content, and can effectively improve the burial efficiency and quality of the sleeve valve pipe.

[0044] In actual use, a fixed base 6 is installed on the ball valve 2, and a hydraulic drive mechanism 5 is installed on the fixed base 6 to bury the sleeve valve tube. A conical clamp 9 is installed on the upper end of the hydraulic drive mechanism 5 which cooperates with it and is used to clamp the sleeve valve tube. The sleeve valve tube can be buried quickly, thereby effectively improving the efficiency of burying the sleeve valve tube. At the same time, due to the mutual cooperation between the hydraulic drive mechanism 5 and the conical clamp 9, the possibility of damage to the sleeve valve tube can be reduced, thereby reducing the construction cost. During construction, only two construction workers are needed to complete the pipe burying operation, which can effectively reduce the labor intensity of the construction workers and reduce the investment in manpower costs.

[0045] It should be noted that, by providing a second check valve 10 in the segment hoisting hole, the sealing state during the sleeve insertion process can be further improved to avoid gushing.

[0046] In actual use, the ball valve 2 is connected to the pipe segment lifting hole through the threaded joint 8, and the ball valve 2 is threadedly connected to the fixed base 6, which is easy to install and disassemble, can improve construction efficiency, and is convenient for turnover.

[0047] In this embodiment, one buckle of the buckle 6-2 is fixed on the base 6-1, and the other buckle of the buckle 6-2 can be pulled upward and tightly attached to one side of the hydraulic drive mechanism 5. Multiple buckles 6-2 can clamp the cylinder body of the hydraulic drive mechanism 5, thereby improving the stability of the hydraulic drive mechanism 5.

[0048] In this embodiment, a conical tip 3 - 1 is provided at the lower end of the bottom sleeve valve pipe section 3 , and a plurality of slurry diffusion holes are provided on the pipe wall of the bottom sleeve valve pipe section 3 and the pipe wall of the spliced ​​sleeve valve pipe section 4 .

[0049] In actual use, the bottom sleeve valve pipe section 3 and the spliced ​​sleeve valve pipe section 4 have the same diameter and are coaxially arranged. The length of the spliced ​​sleeve valve pipe section 4 can be adaptively adjusted according to the thickness of the pipe segment 1, so that the bottom sleeve valve pipe section 3 and one or more spliced ​​sleeve valve pipe sections 4 are spliced ​​together to meet the design requirements of the sleeve valve pipe.

[0050] In this embodiment, the upper and lower interfaces of the ball valve 2 are both provided with internal threads that cooperate with the threaded joint 8. One end of the threaded joint 8 is threadedly connected to the lower interface of the ball valve 2, and the other end of the threaded joint 8 is screwed into the pipe segment lifting hole.

[0051] In actual use, the ball valve 2 is installed in the pipe segment lifting hole through the threaded joint 8, which is convenient for installing and disassembling the ball valve 2.

[0052] In this embodiment, the threaded joint 8 is coaxially arranged with the segment hoisting hole, and a sleeve valve pipe through hole is opened in the middle of the threaded joint 8 along its axial direction.

[0053] In actual use, a circular through hole is opened in the middle of the thread connector 8 along its axial direction to facilitate the sleeve valve tube to pass through. The diameter of the circular through hole on the thread connector 8 is slightly larger than the diameter of the sleeve valve tube.

[0054] like Figure 3 As shown, in this embodiment, the lower end of the base 6 - 1 is provided with a threaded connection column 6 - 3 that matches the internal thread at the upper end interface of the ball valve 2 .

[0055] In actual use, the threaded connection column 6-3 at the lower part of the base 6-1 can be threadedly connected to the upper opening of the ball valve 2, which is convenient for installation and disassembly.

[0056] In this embodiment, the base 6-1 and the threaded connection column 6-3 are coaxially arranged with the segment lifting hole, and the center of the base 6-1 and the threaded connection column 6-3 are provided with through holes along their axial direction for the sleeve valve tube to pass through.

[0057] In actual use, the threaded connection column 6 - 3 and the threaded connector 8 have the same diameter.

[0058] In this embodiment, the hydraulic drive mechanism 5 is a through-core oil cylinder, and an anchor clamp for fixing the sleeve valve tube is provided on the through-core sleeve in the through-core oil cylinder.

[0059] In actual use, by setting the hydraulic drive mechanism 5 as a through-core cylinder, when burying the sleeve valve tube, the sleeve valve tube can pass through the through-core sleeve of the through-core cylinder and be fastened to the through-core sleeve through the anchor clamp, and the sleeve valve tube moves downward driven by the piston body of the through-core cylinder.

[0060] like Figure 4 A shield tunnel buried pipe grouting method is shown, the method comprising the following steps:

[0061] Step 1, install the ball valve: install a second check valve 10 in the segment hoisting hole, install the ball valve 2 on the upper part of the segment hoisting hole through the threaded joint 8, the threaded joint 8 is coaxially arranged with the segment hoisting hole and a sleeve valve pipe through hole is opened in the middle along its axial direction, the two end interfaces of the ball valve 2 are provided with internal threads, the upper end of the threaded joint 8 is threadedly connected to the lower end interface of the ball valve 2, and the lower end of the threaded joint 8 is screwed into the segment hoisting hole from top to bottom;

[0062] In actual use, before burying the sleeve valve pipe, first install a second check valve 10 in the pipe segment lifting hole, which can avoid gushing due to high water content in the stratum during the burying of the sleeve valve pipe.

[0063] Step 2: Fix the hydraulic drive mechanism. The process is as follows:

[0064] Step 201, install the fixed base: the fixed base 6 is threadedly connected to the ball valve 2, the lower end of the base 6-1 is provided with a threaded connection column 6-3 matched with the internal thread at the upper end interface of the ball valve 2, the threaded connection column 6-3 is threadedly connected to the upper end interface of the ball valve 2, the base 6-1 and the threaded connection column 6-3 are coaxially arranged with the pipe segment hanging hole, and the center of the base 6-1 and the threaded connection column 6-3 is provided with a through hole for the sleeve valve pipe to pass through along the axial direction thereof;

[0065] Step 202, installing the hydraulic drive mechanism: the hydraulic drive mechanism 5 is a through-core cylinder, multiple buckles 6-2 are opened outward and downward, and the through-core cylinder is placed directly above the base 6-1, and the hydraulic drive mechanism 5 and the base 6-1 are coaxially arranged;

[0066] In actual use, by setting the hydraulic drive mechanism 5 as a through-core cylinder, the stroke of each operation of the through-core cylinder can be set according to the insertion depth of the sleeve valve tube, which can effectively improve the automation degree of pipe burial and reduce the labor intensity of construction workers.

[0067] Step 203, clamping the hydraulic drive mechanism: closing the multiple buckles 6-2 upward and inward, and clamping and fixing the hydraulic drive mechanism 5 on the base 6-1 through the multiple buckles 6-2;

[0068] Step 3: Determine the length of the sleeve valve tube and fix the sleeve valve tube. The process is as follows:

[0069] Step 301, determine the length of the sleeve valve pipe: determine the designed depth of the lower end of the sleeve valve pipe extending into the formation according to the grouting depth of the grouting soil body, determine the length of the sleeve valve pipe according to the designed depth of the lower end of the sleeve valve pipe extending into the formation and the depth of the pipe segment lifting hole, ensure that when the lower end of the sleeve valve pipe extends into the designed depth of the formation, the upper end of the sleeve valve pipe is located in the ball valve 2, and connect one or more spliced ​​sleeve valve pipe sections 4 to the bottom sleeve valve pipe section 3 according to the determined length of the sleeve valve pipe to form a sleeve valve pipe;

[0070] In actual use, according to the thickness of the pipe segment 1 and the designed depth of the lower end of the sleeve valve pipe extending into the formation, one or more spliced ​​sleeve valve pipe sections 4 can be connected to the bottom sleeve valve pipe section 3 in advance to form the required sleeve valve pipe. When burying the pipe, it is only necessary to bury the sleeve valve pipe downwards. When the upper end of the sleeve valve pipe is located in the ball valve 2, the pipe burying requirements can be met. The operation is simple and can effectively improve the efficiency of pipe burying.

[0071] In this embodiment, the length of the bottom sleeve valve pipe section 3 is equal to the length of the spliced ​​sleeve valve pipe section 4. The length of the spliced ​​sleeve valve pipe section 4 can be set with reference to the distance between the sealing ring in the ball valve 2 and the lower end surface of the pipe segment 1, so that the length of the spliced ​​sleeve valve pipe section 4 is as close as possible to the distance between the sealing ring in the ball valve 2 and the lower end surface of the pipe segment 1.

[0072] Step 302, fixing the sleeve valve tube: after passing one end of the sleeve valve tube section 3 near the bottom of the sleeve valve tube through the through-hole sleeve of the hydraulic drive mechanism 5 from top to bottom, a conical clamp 9 cooperating with the sleeve valve tube is installed at the upper end of the hydraulic drive mechanism 5 to fix the sleeve valve tube. When the piston body of the hydraulic drive mechanism 5 is extended, the conical clamp 9 is in a loose state, and when the piston body of the hydraulic drive mechanism 5 is retracted, the conical clamp 9 is in a clamped state.

[0073] During actual use, when the piston body of the hydraulic drive mechanism 5 is extended, the conical clamp 9 is in a loosened state, which can ensure that the hydraulic drive mechanism 5 drives the sleeve valve tube to move downward, and prevent the conical clamp 9 from being loosened, causing the sleeve valve tube to be stretched under the action of the hydraulic drive mechanism 5, and then damaged; when the piston body of the hydraulic drive mechanism 5 is retracted, the conical clamp 9 is in a clamped state, which can ensure that when the hydraulic drive mechanism 5 releases the sleeve valve tube, the conical clamp 9 can fix the sleeve valve tube, and prevent the sleeve valve tube from falling from the pipe segment lifting hole under the action of its own weight, causing damage to the end of the sleeve valve tube, affecting the final grouting quality.

[0074] Step 4: burying the sleeve valve pipe. First, open the valve of the ball valve 2 to make the ball valve 2 and the pipe segment lifting hole communicate with each other, and then bury the sleeve valve pipe in the formation through the reciprocating telescopic hydraulic drive mechanism 5 of the hydraulic pump station;

[0075] When the piston body of the hydraulic drive mechanism 5 extends, the through-hole sleeve fixed inside the piston body of the hydraulic drive mechanism 5 moves together with the piston body, the anchor clamp at one end of the through-hole sleeve of the hydraulic drive mechanism 5 clamps the sleeve valve tube, and the conical clamp 9 releases the sleeve valve tube, and the sleeve valve tube moves downward by a specified distance under the action of the hydraulic drive mechanism 5;

[0076] When the piston body of the hydraulic drive mechanism 5 retracts and resets, the conical clamp 9 clamps the sleeve valve tube, the anchor clamp at one end of the through-hole of the hydraulic drive mechanism 5 loosens the sleeve valve tube, and the piston body of the hydraulic drive mechanism 5 retracts and resets upward;

[0077] During actual use, when the lower end of the sleeve valve tube has not yet entered the ground and is still in the pipe segment lifting hole, and the piston body of the hydraulic drive mechanism 5 retracts and resets, due to the small resistance received by the sleeve valve tube, the retraction and reset of the piston body of the hydraulic drive mechanism 5 may cause the sleeve valve tube to retract together. In order to avoid the final burial depth of the sleeve valve tube being inconsistent with the cylinder stroke, a weak resistance is artificially applied to the sleeve valve tube when the piston body of the hydraulic drive mechanism 5 retracts and resets to prevent the sleeve valve tube from moving upward.

[0078] In this embodiment, the single reciprocating stroke of the through-core cylinder is determined according to the length of the sleeve valve tube. After the through-core cylinder is reciprocated and extended multiple times, the lower end of the sleeve valve tube can be inserted to the designed depth of the soil layer, and the upper end of the sleeve valve tube is located in the ball valve 2.

[0079] In actual use, when the sleeve valve tube penetrates the concrete at the lower end of the pipe segment lifting hole, the running speed of the through-core cylinder should be adjusted so that the through-core cylinder drives the sleeve valve tube to move downward slowly to avoid the lower end of the sleeve valve tube being damaged due to excessive force caused by the downward movement too fast.

[0080] Step 5: Dismantle the hydraulic drive mechanism: dismantle the fixed base 6, the hydraulic drive mechanism 5 and the conical fixture 9 on the ball valve 2;

[0081] In actual use, the removal method of the fixed base 6, the hydraulic drive mechanism 5 and the conical clamp 9 is the same as the installation method, and the removal task can be completed by following the reverse operation of the installation method.

[0082] Step 6: Grouting reinforcement: Connect the grouting pipe to the upper end interface of the ball valve 2 and start grouting. After the grouting is completed, close the ball valve 2 and remove the grouting pipe.

[0083] In this embodiment, when the piston body of the hydraulic drive mechanism 5 retracts and resets, and the upper end of the sleeve valve tube is lower than the lower surface of the anchor clamp in the hydraulic drive mechanism 5, the conical clamp 9 is first removed. At the same time, a jacking pipe with the same outer diameter as the sleeve valve tube is installed in the through sleeve of the hydraulic drive mechanism 5, and the lower end of the jacking pipe is arranged close to the upper end of the sleeve valve tube. The conical clamp 9 is reinstalled on the upper end of the hydraulic drive mechanism 5, and the hydraulic drive mechanism 5 is extended and retracted by the hydraulic pump station to move the jacking pipe downward. The sleeve valve tube continues to extend downward into the formation under the action of the jacking pipe until the upper end of the sleeve valve tube is located in the ball valve 2, and then the jacking pipe is removed.

[0084] In actual use, the upper end of the sleeve valve tube needs to be lowered into the ball valve 2, so it is necessary to push the sleeve valve tube downward with a jacking pipe. When the upper end of the sleeve valve tube is located in the ball valve 2, the jacking pipe can be removed.

[0085] In this embodiment, the total reciprocating stroke of the hydraulic drive mechanism 5 is set in advance according to the length of the sleeve valve tube. When the jacking pipe is pushed in, it is only necessary to complete the remaining stroke of the hydraulic drive mechanism 5. The entire burial accuracy of the sleeve valve tube is relatively high.

[0086] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A shield tunnel buried pipe grouting system, characterized in that: The invention comprises a ball valve (2) installed at the upper end of a pipe segment lifting hole, wherein a hydraulic pipe burying grouting kit for burying a sleeve valve pipe is installed at the upper end of the ball valve (2), wherein the hydraulic pipe burying grouting kit comprises a hydraulic drive mechanism (5), wherein the sleeve valve pipe is an assembled sleeve valve pipe formed by splicing a bottom sleeve valve pipe section (3) and one or more spliced ​​sleeve valve pipe sections (4), wherein a first check valve (7) is installed in each of the bottom sleeve valve pipe section (3) and the spliced ​​sleeve valve pipe section (4), wherein the hydraulic drive mechanism (5) is installed at the upper end of the ball valve (2) via a fixed base (6), wherein the fixed base (6) comprises a circular base (6-1), wherein the The outer ring of the base (6-1) is provided with a plurality of buckles (6-2) along its circumference for fixing the hydraulic drive mechanism (5), and the upper end of the hydraulic drive mechanism (5) is provided with a conical clamp (9) that cooperates with it and is used to fix the sleeve valve tube. The bottom sleeve valve tube section (3) at the lower end of the sleeve valve tube is driven by the hydraulic drive mechanism (5) to pass through the ball valve (2) and the pipe segment lifting hole from top to bottom in sequence and then inserted into the formation. A second check valve (10) is provided in the pipe segment lifting hole. The ball valve (2) is threadedly connected to the pipe segment lifting hole through a threaded joint (8), and the ball valve (2) is threadedly connected to the fixed base (6).

2. A shield tunnel buried pipe grouting system according to claim 1, characterized in that: The lower end of the bottom sleeve valve pipe section (3) is provided with a conical tip (3-1), and a plurality of slurry diffusion holes are provided on the pipe wall of the bottom sleeve valve pipe section (3) and on the pipe wall of the spliced ​​sleeve valve pipe section (4).

3. A shield tunnel buried pipe grouting system according to claim 1, characterized in that: The upper and lower interfaces of the ball valve (2) are both provided with internal threads matching the threaded connector (8); one end of the threaded connector (8) is threadedly connected to the lower interface of the ball valve (2); and the other end of the threaded connector (8) is screwed into the pipe segment lifting hole.

4. A shield tunnel buried pipe grouting system according to claim 3, characterized in that: The threaded joint (8) is coaxially arranged with the pipe segment hoisting hole, and a sleeve valve pipe through hole is provided in the middle of the threaded joint (8) along its axial direction.

5. A shield tunnel buried pipe grouting system according to claim 3, characterized in that: The lower end of the base (6-1) is provided with a threaded connection column (6-3) that matches the internal thread at the upper end interface of the ball valve (2).

6. A shield tunnel buried pipe grouting system according to claim 5, characterized in that: The base (6-1) and the threaded connection column (6-3) are both coaxially arranged with the pipe segment hoisting hole, and the base (6-1) and the threaded connection column (6-3) are both provided with through holes along their axial directions for the sleeve valve tube to pass through.

7. A shield tunnel buried pipe grouting system according to claim 1, characterized in that: The hydraulic drive mechanism (5) is a through-core oil cylinder, and an anchor clamp for fixing the sleeve valve tube is provided on a through-core sleeve in the through-core oil cylinder.

8. A method for grouting shield tunnel pipes using the system as claimed in claim 5, characterized in that: The method comprises the following steps: Step 1, installing the ball valve: a second check valve (10) is installed in the pipe segment hoisting hole, and the ball valve (2) is installed on the upper part of the pipe segment hoisting hole through the threaded joint (8), the threaded joint (8) is coaxially arranged with the pipe segment hoisting hole and a sleeve valve pipe through hole is opened in the middle along its axial direction, both end interfaces of the ball valve (2) are provided with internal threads, the upper end of the threaded joint (8) is threadedly connected to the lower end interface of the ball valve (2), and the lower end of the threaded joint (8) is screwed into the pipe segment hoisting hole from top to bottom; Step 2: Fix the hydraulic drive mechanism. The process is as follows: Step 201, installing the fixed base: the fixed base (6) is threadedly connected to the ball valve (2), the lower end of the base (6-1) is provided with a threaded connection column (6-3) that matches the internal thread at the upper end interface of the ball valve (2), the threaded connection column (6-3) is threadedly connected to the upper end interface of the ball valve (2), the base (6-1) and the threaded connection column (6-3) are coaxially arranged with the pipe segment lifting hole, and the center of the base (6-1) and the threaded connection column (6-3) is provided with a through hole along the axial direction thereof for the sleeve valve tube to pass through; Step 202, installing the hydraulic drive mechanism: the hydraulic drive mechanism (5) is a through-core oil cylinder, the multiple buckles (6-2) are all opened outward and downward, the through-core oil cylinder is placed directly above the base (6-1), and the hydraulic drive mechanism (5) and the base (6-1) are coaxially arranged; Step 203, clamping the hydraulic drive mechanism: closing the multiple buckles (6-2) upward and inward, and clamping and fixing the hydraulic drive mechanism (5) on the base (6-1) through the multiple buckles (6-2); Step 3: Determine the length of the sleeve valve tube and fix the sleeve valve tube. The process is as follows: Step 301, determining the length of the sleeve valve tube: determining the designed depth of the lower end of the sleeve valve tube extending into the formation according to the grouting depth of the grouting soil body, determining the length of the sleeve valve tube according to the designed depth of the lower end of the sleeve valve tube extending into the formation and the depth of the pipe segment hanging hole, ensuring that when the lower end of the sleeve valve tube extends into the designed depth of the formation, the upper end of the sleeve valve tube is located in the ball valve (2), and connecting one or more spliced ​​sleeve valve tube sections (4) to the bottom sleeve valve tube section (3) according to the determined length of the sleeve valve tube to form a sleeve valve tube; Step 302, fixing the sleeve valve tube: after one end of the sleeve valve tube section (3) close to the bottom of the sleeve valve tube passes through the through-hole sleeve of the hydraulic drive mechanism (5) from top to bottom, a conical clamp (9) matching with the sleeve valve tube is installed at the upper end of the hydraulic drive mechanism (5) to fix the sleeve valve tube, when the piston body of the hydraulic drive mechanism (5) is extended, the conical clamp (9) is in a loose state, and when the piston body of the hydraulic drive mechanism (5) is retracted, the conical clamp (9) is in a clamped state; Step 4: burying the sleeve valve pipe. First, open the ball valve (2) to connect the ball valve (2) with the pipe segment hoisting hole. Then, bury the sleeve valve pipe in the formation by reciprocating and retracting the hydraulic drive mechanism (5) of the hydraulic pump station. When the piston body of the hydraulic drive mechanism (5) extends, the through-hole sleeve fixed inside the piston body of the hydraulic drive mechanism (5) moves together with the piston body, the anchor clamp at one end of the through-hole sleeve of the hydraulic drive mechanism (5) clamps the sleeve valve tube, the conical clamp (9) releases the sleeve valve tube, and the sleeve valve tube moves downward a specified distance under the action of the hydraulic drive mechanism (5); When the piston body of the hydraulic drive mechanism (5) retracts and resets, the conical clamp (9) clamps the sleeve valve tube, the anchor clamp at one end of the through-hole sleeve of the hydraulic drive mechanism (5) releases the sleeve valve tube, and the piston body of the hydraulic drive mechanism (5) retracts and resets upward; Step 5: Dismantle the hydraulic drive mechanism: dismantle the fixed base (6), the hydraulic drive mechanism (5) and the conical fixture (9) on the ball valve (2); Step 6: Grouting reinforcement: Connect the grouting pipe to the upper end interface of the ball valve (2) and start grouting. After the grouting is completed, close the ball valve (2) and remove the grouting pipe.

9. The method according to claim 8, characterized in that: In step 4, when the piston body of the hydraulic drive mechanism (5) retracts and resets, and the upper end of the sleeve valve tube is lower than the lower surface of the anchor clamp in the hydraulic drive mechanism (5), the conical clamp (9) is first removed. At the same time, a jacking pipe with the same outer diameter as the sleeve valve tube is installed in the through-hole of the hydraulic drive mechanism (5), and the lower end of the jacking pipe is arranged close to the upper end of the sleeve valve tube. The conical clamp (9) is reinstalled on the upper end of the hydraulic drive mechanism (5), and the hydraulic drive mechanism (5) is extended and retracted by the hydraulic pump station to move the jacking pipe downward. The sleeve valve tube continues to extend downward into the formation under the action of the jacking pipe until the upper end of the sleeve valve tube is located in the ball valve (2), and then the jacking pipe is removed.

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