A waterproof construction method for shield receiving in a tunnel excavated by dark method

Abstract

The present application relates to shield receiving technical field, disclose a kind of for underground tunnel shield receiving waterproof construction method.This application includes: S1: setting up shield machine outlet position in advance, and construction receiving well in outlet position;S2: placing pedestal at outlet, and installing connecting steel ring outside receiving end wall, and receiving sleeve is installed to pedestal, in this process, one end of receiving sleeve is on connecting steel ring, and setting up abutment rod on receiving sleeve;S3: pouring soil into receiving sleeve, until the sleeve is filled with soil, in this process, the soil in receiving sleeve is tamped continuously;S4: shield machine enters the inside of receiving sleeve from tunnel, after shield machine is in place, grouting is blocked on the connecting steel ring at the hole.This application can tamp the soil in receiving sleeve, to guarantee the sealing of receiving sleeve by soil, so that the deployment work of receiving sleeve is more simple and convenient.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of shield receiving, in particular to a waterproof construction method for shield receiving in a tunnel excavated underground. BACKGROUND

[0002] When building a subway or an underground tunnel, a shield machine is generally used to complete the excavation of the underground tunnel, and there is a great risk when the shield machine performs subsequent receiving work after the tunnel excavation is completed, especially in a high water-rich complex geological environment. When the shield machine is excavated, water and sand are likely to gush out at the outlet because of the difference in pressure between the underground and the outside. When the silt in the tunnel is sprayed out in a large range through the outlet, the outlet part of the tunnel will collapse.

[0003] In order to solve this problem, a receiving waterproof facility is generally preset at the position where the shield machine is excavated. The more common receiving method is the steel sleeve receiving technology. The main receiving principle is to build a sleeve at the destination of the shield machine breaking the soil and ensure the sealing of the sleeve. Then, the silt is added to the sleeve. When the shield machine is excavated, it will directly enter the sleeve. Due to the sealing of the sleeve, the pressure in the tunnel and the outside will not change when the shield machine breaks the soil, so that the water and soil in the tunnel will not be sprayed out. Then, the outlet is closed, and finally the sleeve is removed.

[0004] However, the existing steel sleeve receiving technology has a high requirement for the sealing of the sleeve. In order to ensure the sealing, the steel sleeve needs to be tested after deployment, which increases the difficulty of deployment and the degree of complexity of implementation. Therefore, it is necessary to propose a waterproof construction method for shield receiving in a tunnel excavated underground. SUMMARY

[0005] To solve the above technical problems, the present application provides a waterproof construction method for shield receiving in a tunnel excavated underground.

[0006] The present application adopts the following technical solutions: S1: The outlet position of the shield machine is set in advance, and a receiving well is built at the outlet position;

[0007] S2: A placing base is placed at the outlet, a connecting steel ring is installed outside the receiving end wall, and a receiving sleeve is installed on the placing base. In this process, one end of the receiving sleeve abuts against the connecting steel ring, and an abutting rod is arranged on the receiving sleeve;

[0008] S3: Mud is poured into the receiving sleeve until the sleeve is filled with mud. In this process, the mud in the receiving sleeve is continuously tamped by the tamping mechanism;

[0009] S4: The shield machine enters the inside of the receiving sleeve from the tunnel. After the shield machine is in place, grouting is performed on the connecting steel ring at the hole outlet.

[0010] S5: After the slurry at the opening is solidified and stabilized, the opening is poured again for plugging, and finally the receiving sleeve is removed;

[0011] The shield receiving device comprises a placing base, a receiving sleeve is placed on the placing base, a tamping mechanism is installed at one end of the receiving sleeve, the tamping mechanism comprises a hollow cylinder, a plurality of hydraulic cylinders are fixedly installed on the inner wall of one side of the hollow cylinder, the output rods of the plurality of hydraulic cylinders are fixedly installed with the same connecting plate, the connecting plate is fixedly installed with a sliding rod on one side, the sliding rod extends into the receiving sleeve at one end and is fixedly installed with a pressing plate, the pressing plate is circular and is in sliding connection with the inner wall of the receiving sleeve.

[0012] As a further improvement of the above scheme, the placing base is spliced by a plurality of bases, two first positioning grooves are formed on each of the plurality of bases, two connecting strips are placed on the plurality of bases, a plurality of first positioning blocks are arranged at the bottom of each of the two connecting strips, and the bottoms of the plurality of first positioning blocks extend into and are in sliding connection with the corresponding first positioning grooves.

[0013] As a further improvement of the above scheme, the receiving sleeve is composed of a plurality of lower half cylinders and a plurality of upper half cylinders, the bottoms of the plurality of lower half cylinders are respectively connected with the corresponding bases, the two ends of each lower half cylinder are provided with anti-disengagement grooves, and the two ends of each upper half cylinder extend into the corresponding anti-disengagement grooves.

[0014] As a further improvement of the above scheme, two second positioning grooves are formed on each of the plurality of bases, two second positioning blocks are arranged at the bottom of each of the plurality of lower half cylinders, and the bottoms of the second positioning blocks extend into and are in sliding connection with the second positioning grooves.

[0015] As a further improvement of the above scheme, a filler port is arranged on the corresponding upper half cylinder, a sealing cover is arranged on the filler port, and the sealing cover is connected with the filler port through screws.

[0016] As a further improvement of the above scheme, two locking mechanisms are arranged on each of the plurality of lower half cylinders and upper half cylinders, the locking mechanism comprises an insertion plate welded on the lower half cylinder and a positioning frame welded on the upper half cylinder, the top of the insertion plate penetrates through and is in sliding connection with the positioning frame, a clamping strip is hinged to the positioning frame, a clamping groove is formed on the insertion plate, and a clamping block on the clamping strip corresponds to the clamping groove.

[0017] As a further improvement of the above scheme, three abutting strips are arranged at one end of the hollow cylinder, three abutting rods are arranged at one end of the hollow cylinder, and one end of each of the three abutting rods is in contact with the hollow cylinder and the corresponding abutting strip.

[0018] As a further improvement of the above scheme, pads are arranged at the two ends of the abutting rod.

[0019] As a further improvement of the above scheme, the inner wall of one side of the hollow cylinder is provided with a through hole, and the sliding rod penetrates through the through hole and is in sliding connection with the through hole.

[0020] Compared with the prior art, the present application has the following advantages:

[0021] The base, the lower half cylinder, the upper half cylinder, the first positioning groove, the connecting strip and the like are matched to form a complete shield receiving sleeve, so that water and sand are not likely to gush out when the shield is received, and the shield receiving device is easy to assemble and disassemble, so that it can be recycled and reused.

[0022] The tamping mechanism composed of the hollow cylinder, the hydraulic cylinder, the connecting plate, the sliding rod and the extruding plate can tamp the soil in the structural sleeve, so that it can be similar to the density of the underground soil, so as to ensure that the mud and water in the tunnel will not gush out in a large range when the shield is received, and this way, the sealing property of the receiving sleeve is not required too much, and the tamped soil itself can keep good sealing property in the receiving sleeve, so that the sealing property of the receiving sleeve is not required too much when the receiving sleeve is deployed, so that the deployment of the receiving sleeve is more simple and convenient. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 It is a right view structure schematic diagram of the shield receiving waterproof construction method in the underground excavation tunnel of the present application;

[0024] Figure 2 It is a left view structure schematic diagram of the shield receiving waterproof construction method in the underground excavation tunnel of the present application.

[0025] Figure 3 It is a left view first disassembly display diagram of the shield receiving waterproof construction method in the underground excavation tunnel of the present application;

[0026] Figure 4 It is a bottom view disassembly display diagram of the shield receiving waterproof construction method in the underground excavation tunnel of the present application;

[0027] Figure 5 It is a left view second disassembly display diagram of the shield receiving waterproof construction method in the underground excavation tunnel of the present application;

[0028] Figure 6 It is a sectional view display diagram of the shield receiving waterproof construction method in the underground excavation tunnel of the present application.

[0029] MAIN SYMBOL EXPLANATION

[0030] 1, base; 2, lower half cylinder; 3, upper half cylinder; 4, filler port; 5, sealing cover; 6, hollow cylinder; 7, hydraulic cylinder; 8, connecting plate; 9, sliding rod; 10, extrusion plate; 11, resistance strip; 12, resistance rod; 13, first positioning groove; 14, connecting strip; 15, first positioning block; 16, second positioning groove; 17, second positioning block; 18, locking mechanism. DETAILED DESCRIPTION

[0031] The application will be further described below in conjunction with the drawings and specific embodiments.

[0032] Please combine Figures 1 to 6 The waterproof construction method for receiving a shield in a tunnel excavated by a dark method of the embodiment comprises the following steps:

[0033] S2: placing a base at the outlet and installing a connecting steel ring outside the receiving end wall, and installing a receiving sleeve on the base, wherein one end of the receiving sleeve abuts against the connecting steel ring, and a resistance rod is arranged on the receiving sleeve;

[0034] S3: pouring soil into the receiving sleeve until the sleeve is filled with soil, and continuously tamping the soil in the receiving sleeve by using the tamping mechanism;

[0035] S4: the shield machine enters the inside of the receiving sleeve from the tunnel, and after the shield machine is in place, grouting is performed on the connecting steel ring at the hole to block it;

[0036] S5: after the grout at the hole solidifies and stabilizes, the hole is subjected to secondary pouring to block it, and finally the receiving sleeve is removed;

[0037] The shield receiving device comprises a base, a receiving sleeve is placed on the base, a tamping mechanism is installed at one end of the receiving sleeve, the tamping mechanism comprises a hollow cylinder 6, a plurality of hydraulic cylinders 7 are fixedly installed on the inner wall of one side of the hollow cylinder 6, a connecting plate 8 is fixedly installed on the output rods of the plurality of hydraulic cylinders 7, a sliding rod 9 is fixedly installed on one side of the connecting plate 8, an extrusion plate 10 is fixedly installed at one end of the sliding rod 9 extending into the receiving sleeve, and the extrusion plate 10 is circular and slidably connected with the inner wall of the receiving sleeve.

[0038] The base is formed by splicing a plurality of bases 1, two first positioning grooves 13 are formed in each of the plurality of bases 1, two connecting strips 14 are placed on the plurality of bases 1, a plurality of first positioning blocks 15 are arranged at the bottom of each of the two connecting strips 14, and the bottoms of the plurality of first positioning blocks 15 respectively extend into and are slidably connected with the corresponding first positioning grooves 13.

[0039] Through the technical scheme, the base 1, the connecting strip 14, the first positioning block 15 and the first positioning groove 13 are matched, so that the placing base can be assembled and disassembled, and compared with a large overall mechanism, a plurality of small mechanisms which can be disassembled and assembled are relatively more easily moved.

[0040] The receiving sleeve is composed of a plurality of lower half sleeves 2 and a plurality of upper half sleeves 3, the bottoms of the plurality of lower half sleeves 2 are respectively connected with corresponding bases 1, both ends of the lower half sleeve 2 are provided with anti-disengagement grooves, and both ends of the upper half sleeve 3 respectively extend into the corresponding anti-disengagement grooves.

[0041] Through the technical scheme, the lower half sleeve 2 and the upper half sleeve 3 enable the entire receiving sleeve to be disassembled and assembled, so that the receiving sleeve is not only more easily moved, but also can be conveniently disassembled when the shield machine enters the inside of the receiving sleeve.

[0042] Two second positioning grooves 16 are formed in each of the plurality of bases 1, and the bottoms of the plurality of lower half sleeves 2 are respectively provided with two second positioning blocks 17, the bottoms of the second positioning blocks 17 extend into the second positioning grooves 16 and are in sliding connection with the second positioning grooves 16.

[0043] Through the technical scheme, the second positioning groove 16 cooperates with the second positioning block 17, so that the lower half sleeve 2 and the upper half sleeve 3 can be forcibly limited as a whole by the placing base, and are not easily displaced due to impact.

[0044] A filler port 4 is arranged on the corresponding upper half sleeve 3, a sealing cover 5 is arranged on the filler port 4, and the sealing cover 5 is connected with the filler port 4 by screws.

[0045] Through the technical scheme, the filler port 4 is mainly used for adding soil into the receiving sleeve, and is located close to the extrusion plate 10, so that the extrusion plate 10 can directly extrude and compact the soil falling into the receiving sleeve.

[0046] Two locking mechanisms 18 are arranged on each of the plurality of lower half sleeves 2 and the plurality of upper half sleeves 3, the locking mechanism 18 comprises an insertion plate welded on the lower half sleeve 2 and a positioning frame welded on the upper half sleeve 3, the top of the insertion plate penetrates through the positioning frame and is in sliding connection with the positioning frame, a clamping strip is hinged on the positioning frame, a clamping groove is formed in the insertion plate, and a clamping block on the clamping strip corresponds to the clamping groove.

[0047] Through the technical scheme, when the upper half sleeve 3 is arranged on the lower half sleeve 2, the two clamping strips on the lower half sleeve 2 penetrate through the two positioning frames on the upper half sleeve 3, then the clamping strips on the positioning frames are clamped into the clamping grooves on the clamping strips, so that the lower half sleeve 2 and the upper half sleeve 3 are locked together, and the two will not be separated under pressure when the subsequent compacting mechanism extrudes the soil.

[0048] The one end of the hollow cylinder 6 is provided with three abutting strips 11, and the one end of the hollow cylinder 6 is provided with three abutting rods 12, and the one end of each of the three abutting rods 12 is in contact with the hollow cylinder 6 and the corresponding abutting strip 11.

[0049] Through the above technical scheme, the abutting strip 11 mainly serves as a stress point when the abutting rod 12 abuts against the hollow cylinder 6, so that the abutting rod 12 does not move after being stressed.

[0050] The two ends of the abutting rod 12 are each provided with a pad foot.

[0051] Through the above technical scheme, the pad foot not only serves as a basis for the inclination angle when the abutting rod 12 is abutted tightly, but also makes the abutting rod 12 more easily stressed when in contact with the ground and the hollow cylinder 6.

[0052] A through hole is formed in the inner wall of one side of the hollow cylinder 6, and the sliding rod 9 penetrates through the through hole and is in sliding connection with the through hole.

[0053] Through the above technical scheme, the through hole enables the sliding rod 9 to extend to the outside of the hollow cylinder 6 and normally drive the extrusion plate 10 to move.

[0054] The implementation principle of the method for waterproof construction of shield receiving in a tunnel excavated by a hidden method in the embodiment of the application is as follows:

[0055] First step: when deploying, the connecting steel ring is installed on the end wall of the receiving well, and then a plurality of bases 1 are arranged, and then the plurality of bases 1 are connected into a placing base through two connecting strips 14, and the one end of the placing base is abutted against the end wall, then a plurality of lower half cylinders 2 are placed on the placing base, and then a plurality of upper half cylinders 3 are erected on the plurality of lower half cylinders 2, so that they form a complete receiving sleeve, and finally the hollow cylinder 6 is abutted against the one end of the receiving sleeve as a main tamping mechanism, and the tamping mechanism and the whole receiving device are abutted tightly through the abutting rod 12;

[0056] Second step: the sealing cover 5 is opened, and the soil is continuously poured into the receiving sleeve through the filling port 4, when the receiving sleeve is filled with soil, the tamping mechanism is started, at this time, the plurality of hydraulic cylinders 7 drive the connecting plate 8, the sliding rod 9 and the extrusion plate 10 to move through the output rod, so that the extrusion plate 10 can extrude the soil in the receiving sleeve, and new soil is continuously added in the process, so that the density of the soil in the receiving sleeve becomes larger.

[0057] Third step: when the shield machine breaks the end wall and excavates into the receiving sleeve, the density of the soil in the receiving sleeve is large, so that the silt water in the tunnel does not burst out due to the pressure problem, then the surrounding of the hole is poured and reinforced, and after the hole is stable, the receiving sleeve can be removed.

[0058] The above embodiments are only the preferred embodiments of the present application, and cannot be used to limit the protection scope of the present application, and any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the protection scope of the present application.

Claims

1. A method for waterproof construction of shield receiving in a tunnel excavated by a shield tunneling method, characterized by, The utility model adopts the shield receiving device, and the shield receiving device includes the placement base, the receiving sleeve is placed on the placement base, one end of receiving sleeve is installed with the ramming mechanism, the ramming mechanism includes the hollow cylinder, a plurality of hydraulic cylinders are fixedly installed in the one side inner wall of hollow cylinder, the output rod of a plurality of hydraulic cylinders is fixedly installed with the same connecting plate, one side of connecting plate is fixedly installed with the slide bar, one end of slide bar extends to receiving sleeve and is fixedly installed with the extrusion plate, the extrusion plate is circular and is connected with the inner wall of receiving sleeve, and the utility model relates to the following steps: S1: the position of shield machine outlet is set in advance, and the receiving well is constructed at the outlet position; S2: the placement base is placed at the outlet, the connecting steel ring is installed outside the receiving end wall, and the receiving sleeve is installed on the placement base, one end of the receiving sleeve abuts against the connecting steel ring, and the abutting rod is arranged on the receiving sleeve during the process; S3: the soil is poured into the receiving sleeve until the sleeve is filled with soil, and the soil in the receiving sleeve is rammed by the ramming mechanism during the process; S4: the shield machine enters the inside of the receiving sleeve from the tunnel, and after the shield machine is in place, the connecting steel ring at the hole is grouted and blocked; S5: after the slurry at the hole is solidified and stable, the hole is secondarily poured and blocked, and finally the receiving sleeve is removed.

2. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 1, wherein The placement base is spliced by a plurality of bases, two first positioning grooves are formed in each base, two connecting strips are placed on the bases, a plurality of first positioning blocks are arranged at the bottom of the two connecting strips, and the bottoms of the first positioning blocks respectively extend into and are slidably connected with the corresponding first positioning grooves.

3. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 2, wherein The receiving sleeve is composed of a plurality of lower half cylinders and a plurality of upper half cylinders, the bottoms of the lower half cylinders are respectively connected with the corresponding bases, both ends of the lower half cylinder are provided with anti-disengagement grooves, and both ends of the upper half cylinder respectively extend into the corresponding anti-disengagement grooves.

4. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 3, wherein Two second positioning grooves are formed in each base, two second positioning blocks are arranged at the bottom of each lower half cylinder, and the bottoms of the second positioning blocks extend into and are slidably connected with the second positioning grooves.

5. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 3, wherein A filler port is arranged on the corresponding upper half cylinder, a sealing cover is arranged on the filler port, and the sealing cover is connected with the filler port by screws.

6. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 3, wherein Two locking mechanisms are arranged on each lower half cylinder and upper half cylinder, the locking mechanism comprises an insertion plate welded on the lower half cylinder and a positioning frame welded on the upper half cylinder, the top of the insertion plate penetrates through and is slidably connected with the positioning frame, a clamping strip is hinged to the positioning frame, a clamping groove is formed in the insertion plate, and the clamping blocks on the clamping strip correspond to the clamping groove.

7. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 1, wherein One end of the hollow cylinder is provided with three abutting rods, and one end of each of the three abutting rods is in contact with the hollow cylinder and the corresponding abutting strip.

8. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 7, wherein The both ends of the abutting rod are provided with pads.

9. The waterproofing method for shield receiving construction in a tunnel excavated by a method according to claim 1, wherein A perforation is formed in the inner wall of one side of the hollow cylinder, and the slide bar penetrates through and is slidably connected with the perforation.

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