Pipe jacking section for monitoring soil pressure and water pressure and construction monitoring method

Abstract

The invention discloses a pipe jacking section for monitoring soil pressure and water pressure and a construction monitoring method, and relates to the technical field of pipe jacking. The jacking pipe joint for monitoring the soil pressure and the water pressure comprises a pipe joint body, a soil pressure monitoring mechanism and a water pressure monitoring mechanism. A rib cage net is arranged in the pipe joint main body; the soil pressure monitoring mechanism comprises a sleeve and a soil pressure box, a first mounting hole is formed in the pipe joint main body, a lifting structure is arranged in the sleeve, the lifting structure retracts the soil pressure box to the position below the surface of the pipe joint main body in the starting stage, and the lifting structure ejects the soil pressure box out to be flush with the surface of the pipe joint main body after the starting stage; the water pressure monitoring mechanism comprises a sleeve and a water pressure gauge, a second mounting hole is formed in the outer wall of the pipe joint body, the sleeve is arranged in the second mounting hole, and the water pressure gauge is arranged in the sleeve. The construction monitoring method comprises the steps of manufacturing, installing, constructing and monitoring the pipe jacking section for monitoring the soil pressure and the water pressure. The device has the beneficial effects of protecting measuring equipment and ensuring smooth monitoring.

Description

Technical Field

[0001] The invention relates to the technical field of pipe jacking, and in particular to a pipe jacking section for monitoring soil pressure and water pressure and a construction monitoring method. Background Art

[0002] Pipe jacking construction is a pipeline burial construction technology that does not involve excavation or requires minimal excavation. In the working pit, the jacking force generated by the jacking equipment overcomes the friction between the pipeline and the surrounding soil. The jacking pipe is pushed into the soil according to the designed slope. After one section of the pipe is pushed into the soil, the second section of the pipe is pushed in. Pipe jacking technology is widely used in laying, replacing and repairing various pipelines across roads, railways, rivers, downtown areas, etc. where excavation is not allowed or not available. Pipe jacking construction technology has the advantages of low comprehensive cost, short construction period, small environmental impact, and good construction safety. It is widely used in the construction of underground pipelines such as municipal water supply and drainage, communication cables, gas pipelines, and power cables.

[0003] In existing pipe jacking construction, it is necessary to install soil pressure boxes and water pressure gauges to obtain soil pressure and water pressure data on the pipe sections during and after the jacking construction, and to use the soil pressure and water pressure data to feedback the stress state of the pipe sections during the construction process. In order to measure more accurately, the surface of the soil pressure box needs to be level with the surface of the pipe section, but at the initial stage of the pipe section jacking, the hole reinforcement section is easy to scratch the surface of the soil pressure box, which may cause damage to the soil pressure box.

[0004] Therefore, the prior art needs to be improved. Summary of the invention

[0005] The technical problem to be solved by the present invention is that the soil pressure box in the prior art is easily damaged at the initial stage of pipe jacking. The purpose is to provide a pipe jacking segment and construction monitoring method for monitoring soil pressure and water pressure, adopt corresponding technical means to protect the measuring equipment, and ensure the beneficial effect of smooth monitoring.

[0006] The present invention is achieved through the following technical solutions: In a first aspect, the present invention provides a jacking pipe joint for monitoring earth pressure and water pressure, which comprises a pipe joint body, an earth pressure monitoring mechanism and a water pressure monitoring mechanism; The pipe segment body is prefabricated with concrete, and a steel cage net is arranged inside the pipe segment body to increase strength; The soil pressure monitoring mechanism includes a sleeve and a soil pressure box. The outer wall of the pipe segment body is provided with a first mounting hole. The sleeve is arranged in the first mounting hole. A lifting structure connected to the soil pressure box is arranged in the sleeve. In the initial stage, the lifting structure retracts the soil pressure box to below the surface of the pipe segment body. After the initial stage, the lifting structure pushes the soil pressure box out to be flush with the surface of the pipe segment body. The water pressure monitoring mechanism includes a sleeve and a water pressure gauge. The outer wall of the pipe section body is provided with a second mounting hole. The sleeve is arranged in the second mounting hole. The water pressure gauge is arranged in the sleeve. The lifting structure includes a driving motor, a dual-drive guide tube and a dual-drive guide rod. The soil pressure box is threadedly connected to the sleeve, the dual-drive guide rod is connected to the soil pressure box, the dual-drive guide rod is inserted into the dual-drive guide tube, and the dual-drive guide tube is transmission-connected to the driving motor. The transmission connection includes gear transmission or belt transmission.

[0007] Furthermore, in the present invention, the lifting structure further comprises a bearing, the outer portion of the bearing is fixedly connected to the sleeve, and the inner ring of the bearing is fixedly connected to the dual-drive guide tube.

[0008] Furthermore, in the present invention, the above-mentioned sleeve is provided with a limit stop ring, the bottom of the limit stop ring is provided with a limit surface that makes the top surface of the earth pressure box flush with the outer wall of the pipe segment body, and the limit stop ring is also provided with an inclined sealing surface, and the sealing surface is provided with a rubber seal.

[0009] Furthermore, in the present invention, the above-mentioned dual-drive guide rod is connected to two first support rods, the first support rod is connected to two symmetrical second support rods, the first support rod and the second support rod are both fixedly connected to the bottom surface of the soil pressure box, and the center lines of the first support rod and the dual-drive guide rod are in the same plane.

[0010] Furthermore, in the present invention, the plurality of soil pressure monitoring mechanisms are arranged along the circumference of the pipe segment body at equal intervals, and the plurality of water pressure monitoring mechanisms are arranged along the circumference of the pipe segment body at equal intervals.

[0011] Furthermore, in the present invention, the first mounting hole and the second mounting hole are axially spaced more than 10 centimeters apart.

[0012] Furthermore, in the present invention, the sleeve and the casing are both welded and fixed to the steel cage mesh before precast concrete is poured.

[0013] Furthermore, in the present invention, the above-mentioned steel cage mesh is fixedly connected with an axial steel strain gauge and a circumferential steel strain gauge.

[0014] In a second aspect, the present invention also provides a construction monitoring method, which uses a jacking pipe section for monitoring soil pressure and water pressure, and also includes the following method: S1. In the pipe segment processing plant, mark the installation positions of the sleeves and casings determined on the welded steel cage net, then hoist the steel cage net into the mold, pour and vibrate the prepared concrete to form the pipe segment body, and maintain and cool the pipe segment body to the predetermined strength; S2. Transport the pipe segment to the pipe jacking construction site, and install the lifting structure, earth pressure box, and water pressure gauge in the sleeve and casing at the construction site; S3. First, use the lifting machinery to lift the main body of the pipe segment into the construction pit, then connect the power supply and data lines of the lifting structure, earth pressure box, and water pressure, and use the vibrating string frequency reading instrument to detect the operating status and initial value of the earth pressure box and water pressure gauge and record them; S4. The pipe jacking machine pushes the pipe segment body into the hole. At the initial stage, the lifting structure retracts the earth pressure box to below the surface of the pipe segment body. After the initial stage, the pipe segment body passes through the reinforcement section of the hole, and the lifting structure pushes the earth pressure box out to be flush with the surface of the pipe segment body. S5, the vibrating-wire frequency reading instrument collects data from the earth pressure box and the water pressure gauge and transmits it to the cloud. The cloud processes and calculates the stress data in real time and compares it with the threshold set based on the engineering requirements. If the threshold is exceeded, the cloud will send an early warning message to the construction monitoring computer. S6. After the jacking construction is completed, the lifting structure is removed, and then the sealing sleeve and casing are grout-casted.

[0015] Furthermore, in the present invention, the sleeve and casing at the top of the grouting seal are provided with a plug, the plug is provided with a grouting pipe and an exhaust pipe, the grouting pipe is connected to a grouting pump, the grouting pipe is lower than the exhaust pipe, and the top of the exhaust pipe is a bevel port.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects: The present invention provides a pipe jacking section for monitoring soil pressure and water pressure, comprising a pipe section body, a soil pressure monitoring mechanism, a water pressure monitoring mechanism and a lifting structure, wherein the soil pressure monitoring mechanism comprises a sleeve and a soil pressure box, and the water pressure monitoring mechanism comprises a sleeve and a water pressure gauge. The lifting structure is connected to the soil pressure box, and the lifting structure can drive the soil pressure box to rise or fall in the sleeve. In the initial stage, the lifting structure retracts the soil pressure box to below the surface of the pipe section body, which can prevent the hole reinforcement section from scratching the surface of the soil pressure box during jacking. After the initial stage, the lifting structure pushes the soil pressure box out and flushes it with the surface of the pipe section body, ensuring that the soil pressure box can work normally, which has the advantages of protecting the measuring equipment (soil pressure box) and ensuring smooth monitoring.

[0017] The present invention also provides a construction monitoring method, firstly installing an earth pressure monitoring mechanism, a water pressure monitoring mechanism and a lifting structure on the pipe segment body, then the pipe jacking machine pushes the pipe segment body into the hole, at this stage the lifting structure retracts the earth pressure box to below the surface of the pipe segment body, after pushing into the hole, the lifting structure pushes the earth pressure box out and flush with the surface of the pipe segment body, protecting the earth pressure box from being damaged, and finally removing the lifting structure and grouting and sealing. The earth pressure monitoring mechanism and the water pressure monitoring mechanism continuously monitor the earth pressure and water pressure, and timely warn of risks. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the exemplary embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without creative work. In the drawings: Figure 1 It is a cross-sectional schematic diagram of a jacking pipe section for monitoring soil pressure and water pressure of the present invention; Figure 2 It is a cross-sectional schematic diagram of the soil pressure monitoring mechanism and the lifting structure of the present invention; Figure 3 for Figure 2 The enlarged schematic diagram of point A in the middle; Figure 4 It is a cross-sectional schematic diagram of the soil pressure monitoring mechanism and the plug of the present invention; Figure 5 It is a schematic structural diagram of the first support rod and the second support rod of the present invention.

[0019] Markings and corresponding parts names in the accompanying drawings: 1- pipe segment body, 101- steel cage mesh, 102- first mounting hole, 103- second mounting hole, 2- earth pressure monitoring mechanism, 201- sleeve, 202- earth pressure box, 203- limit retaining ring, 2031- limit surface, 2032- rubber seal, 2033- welding rod, 3- water pressure monitoring mechanism, 301- casing, 302- water pressure gauge, 4- lifting structure, 401- driving motor, 402- double driving guide tube, 403- double driving guide rod, 4031- first support rod, 4032- second support rod, 404- bearing, 5- axial steel bar strain gauge, 6- circumferential steel bar strain gauge, 7- plug, 701- grouting pipe, 702- exhaust pipe. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical scheme and advantages of the present invention clearer, the present invention is further described in detail below in conjunction with the embodiments and drawings. The schematic implementation mode of the present invention and its description are only used to explain the present invention and are not intended to limit the present invention. The following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present invention.

[0021] It should be noted that similar numbers and letters represent similar items in the following figures, so once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the embodiments of the present invention, "multiple" represents at least 2. In the description of the embodiments of the present invention, it should also be noted that unless otherwise clearly specified and limited, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium, and it can be the internal connection of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0022] Example 1, reference Figures 1 to 5 As shown, a jacking pipe section for monitoring soil pressure and water pressure provided in this embodiment 1 has a specific structure as follows.

[0023] The jacking pipe section for monitoring earth pressure and water pressure of embodiment 1 of the present invention mainly includes four parts: a pipe section body 1, an earth pressure monitoring mechanism 2, a water pressure monitoring mechanism 3 and a lifting structure 4. Among them, the pipe section body 1 is the main part of the jacking pipe section for monitoring earth pressure and water pressure, and is constructed into a pipeline underground during construction. The earth pressure monitoring mechanism 2 is used to monitor the soil stress borne by the pipe section body 1, and the water pressure monitoring mechanism 3 is used to monitor the pore water pressure or seepage stress borne by the pipe section body 1. The lifting structure 4 is used to drive the earth pressure box 202 to rise or fall to avoid scratches, crushing and damage to the earth pressure box 202.

[0024] Further, combined with Figure 1 As shown, the pipe segment body 1 is a circular tube cast with concrete. Before casting, a bundled and welded steel cage mesh 101 is placed in the mold. After casting, the steel cage mesh 101 is fixed inside the pipe segment body 1. The steel cage mesh 101 can increase the structural strength of the pipe segment body 1.

[0025] In some implementations of this embodiment, Figure 1As shown, the water pressure monitoring mechanism 3 includes a casing 301 and a water pressure gauge 302. The casing 301 is a slender metal tube, and the inner wall of the metal tube is processed with internal threads. The water pressure gauge 302 adopts the JTM-V3000F vibrating wire pore water pressure gauge of the prior art. The outer wall of the water pressure gauge 302 is processed with external threads. The water pressure gauge 302 and the casing 301 are connected in a threaded connection, which can be both firmly connected and sealed. The top of the water pressure gauge 302 is about 2 cm away from the top of the casing 301. Since water is fluid, it can prevent the sensing surface of the water pressure gauge 302 from being scratched, and the water pressure gauge 302 can play a normal water pressure data collection effect.

[0026] Combination Figure 1 As shown, the pipe segment body 1 is provided with a second mounting hole 103 that penetrates inside and outside, and the sleeve 301 is fixed in the second mounting hole 103. The mounting method can be adopted that the sleeve 301 is fixed on the steel cage 101 by welding before pouring the pipe segment body 1, and then cement is poured, and after the cement is dried and formed, the top end of the sleeve 301 is flush with the outer wall of the pipe segment body 1, and the bottom end of the sleeve 301 is flush with the inner wall of the pipe segment body 1.

[0027] In some implementations of this embodiment, Figure 1 and Figure 2 As shown, the earth pressure monitoring mechanism 2 includes a sleeve 201 and an earth pressure box 202. The sleeve 201 is made of metal and includes an upper section with a larger diameter and a lower section with a smaller diameter. The upper section is used to accommodate the earth pressure box 202. Figure 2 As shown, the pipe segment body 1 is also provided with a first mounting hole 102 that penetrates inside and outside, and the sleeve 201 is fixed in the first mounting hole 102. The mounting method can be adopted that the sleeve 201 is fixed on the steel cage 101 by welding before pouring the pipe segment body 1, and then cement is poured, and after the cement is dried and formed, the top end of the sleeve 201 is flush with the outer wall of the pipe segment body 1, and the bottom end of the sleeve 201 is flush with the inner wall of the pipe segment body 1.

[0028] Furthermore, the earth pressure box 202 adopts the JTM-V2000B vibrating-wire earth pressure gauge in the prior art, the upper section of the sleeve 201 is processed with an internal thread, and the outer wall of the earth pressure box 202 is processed with an external thread, the earth pressure box 202 and the sleeve 201 are fixedly connected by a threaded connection, and the earth pressure box 202 can be raised or lowered in the sleeve 201 by rotating the earth pressure box 202.

[0029] It should be noted that the first mounting hole 102 and the second mounting hole 103 are more than 10 cm apart in the axial direction. Preferably, the first mounting hole 102 and the second mounting hole 103 are 10 cm or 15 cm apart in the axial direction to reduce the mutual influence between the earth pressure monitoring mechanism 2 and the water pressure monitoring mechanism 3. In this embodiment, four earth pressure monitoring mechanisms 2 and four water pressure monitoring mechanisms 3 are installed, and the four earth pressure monitoring mechanisms 2 are installed as a group or the four water pressure monitoring mechanisms 3 are installed as a group along the circumference of the pipe segment body 1, and the adjacent earth pressure monitoring mechanisms 2 or water pressure monitoring mechanisms 3 are at the same interval.

[0030] In some implementations of this embodiment, Figure 2 As shown, the lifting structure 4 mainly includes three parts: a driving motor 401, a dual-drive conduit 402, and a dual-drive guide rod 403. The driving motor 401 adopts a servo motor in the prior art and is fixedly mounted on the inner wall of the pipe segment body 1 by bolts. The dual-drive guide rod 403 is two parallel guide rods, and the dual-drive conduit 402 is two parallel conduits. The top of the dual-drive guide rod 403 is fixedly connected to the bottom surface of the earth pressure box 202, and the dual-drive guide rod 403 can be inserted into the dual-drive conduit 402 and move up and down along the dual-drive conduit 402.

[0031] Further, combined with Figure 2 As shown, the bottom of the dual-drive conduit 402 is fixedly connected with a gear 1, the dual-drive guide rod 403 and the dual-drive conduit 402 are symmetrical with respect to the gear 1 and the center of the earth pressure box 202, the gear 1 is meshed with the gear 2 of the drive motor 401, and the earth pressure box 202 is driven by the drive motor 401 to rotate, so that the earth pressure box 202 is raised or lowered. Since the dual-drive guide rod 403 can move up and down along the dual-drive conduit 402, the dual-drive conduit 402 can remain stationary.

[0032] Furthermore, a bearing 404 with a support is installed at the bottom end of the sleeve 201, the outer portion (support portion) of the bearing 404 is fixed to the bottom end of the sleeve 201 by screws, and the inner ring of the bearing 404 and the dual-drive conduit 402 are fixedly connected by welding. The bearing 404 supports the dual-drive conduit 402 and does not affect the rotation of the dual-drive conduit 402.

[0033] It should be noted that, in order to ensure that the earth pressure box 202 is installed in place and the top surface of the earth pressure box 202 is flush with the outer wall of the pipe segment body 1, a limit stop ring 203 is welded inside the upper section of the sleeve 201, and the edge of the limit stop ring 203 and the edge of the sleeve 201 are fixed by welding rods 2033. Figure 2 and Figure 3As shown, the bottom of the limit stop ring 203 is a limit surface 2031, and a step surface is provided on the side wall of the earth pressure box 202. When the earth pressure box 202 rotates upward, the step surface is locked and blocked by the limit surface 2031. At this time, the top surface of the earth pressure box 202 is just flush with the outer wall of the pipe segment body 1, which has a better use effect.

[0034] Further, combined with Figure 2 and Figure 3 As shown, the limit retaining ring 203 and the earth pressure box 202 are both provided with inclined sealing surfaces that fit each other, and a rubber seal 2032 (i.e., a sealing ring) is fixed on the sealing surface of the limit retaining ring 203. After the earth pressure box 202 moves upward, the rubber seal 2032 is squeezed to achieve a certain sealing effect. In order not to affect the rotation of the earth pressure box 202 during the initial contact, lubricating oil can be applied to the side of the rubber seal 2032 facing the inclined surface of the earth pressure box 202, so as to facilitate the rotation of the earth pressure box 202 while still achieving a sealing effect.

[0035] Combination Figure 2 , Figure 4 and Figure 5 As shown, two first support rods 4031 are fixedly connected on the upper side of the dual-drive guide rod 403 by welding, that is, one guide rod is connected to one first support rod 4031. The end of the first support rod 4031 away from the dual-drive guide rod 403 extends to the edge of the bottom surface of the earth pressure box 202, and is fixedly connected to the bottom surface of the earth pressure box 202. Two second support rods 4032 are welded in the middle position of the first support rod 4031. The second support rods 4032 are symmetrically distributed compared to the first support rod 4031. The end of the second support rod 4032 away from the first support rod 4031 extends to the edge of the bottom surface of the earth pressure box 202, and is fixedly connected to the bottom surface of the earth pressure box 202. The fixed connection between the dual-drive guide rod 403 and the earth pressure box 202 is enhanced by the first support rod 4031 and the second support rod 4032. As shown Figure 2 As shown, the center lines of the first support rod 4031 and the dual-drive guide rod 403 are in the same plane, so that the earth pressure box 202 is subjected to uniform force, the drive is smooth, and the design is reasonable.

[0036] It should be noted that a reinforcing cross bar may be fixedly connected between the dual driving guide rods 403 , and a reinforcing cross bar may also be fixedly connected between the dual driving guide tubes 402 .

[0037] In some implementations of this embodiment, Figure 1As shown, the steel cage mesh 101 is installed with an axial steel strain gauge 5 and an annular steel strain gauge 6. Both the axial steel strain gauge 5 and the annular steel strain gauge 6 are JTM-V1000I steel strain gauges, and the data output is in the form of vibrating wire signals. It should be noted that in order to connect the axial steel strain gauge 5, the annular steel strain gauge 6 and the steel cage mesh 101 as a whole, the steel cage mesh 101 at the corresponding position is cut off and the axial steel strain gauge 5 or the annular steel strain gauge 6 is welded at the cut position to make it a part of the steel cage mesh 101. Therefore, the measured data is the steel strain. Since the pipe segment is deformed in coordination as a whole, the steel strain is the strain at the same position of the pipe segment body 1.

[0038] The power supply lines or data lines of the axial steel bar strain gauge 5, the annular steel bar strain gauge 6, the earth pressure box 202, the water pressure gauge 302, and the drive motor 401 are all extended to the inside of the pipe segment body 1, and are powered by a mobile power supply (which needs to be replaced regularly) or a power grid. The data line connects the MCU acquisition unit and the vibrating string frequency reader, and the acquisition frequency is once every 10 minutes. The vibrating string frequency reader is connected to the cloud through the network, and the cloud server is connected to the construction monitoring computer through the network.

[0039] Embodiment 2: This embodiment provides a construction monitoring method, which adopts the jacking pipe section for monitoring soil pressure and water pressure in Embodiment 1, and also includes the following method.

[0040] S1. First, in the pipe segment processing plant, mark the installation positions of the sleeve 201 and the sleeve 301 determined on the welded steel cage 101, then hoist the steel cage 101 into the mold, use the prepared concrete to pour and vibrate to form the pipe segment body 1, and maintain the pipe segment body 1 to cool to the predetermined strength.

[0041] S2, transporting the pipe segment body 1 to the pipe jacking construction site, and installing the lifting structure 4, the earth pressure box 202, and the water pressure gauge 302 in the sleeve 201 and the casing 301 at the construction site.

[0042] S3. During the pipe jacking construction process, a pipe jacking section for monitoring soil pressure and water pressure of Example 1 is installed every 10 sections or more of ordinary pipe sections. During installation, the pipe section body 1 is first hoisted into the construction pit by a hoisting machine, and then the lifting structure 4, the soil pressure box 202, and the power supply line and data line of the water pressure are connected. The data line is connected to the MCU acquisition unit and the vibrating string frequency reader, and the power supply line is connected to a mobile power supply (which needs to be replaced regularly) or a power grid. The operating status and initial value of the soil pressure box 202 and the water pressure gauge 302 are detected and recorded by the vibrating string frequency reader, and the initial parameters and acquisition time interval (for example, once every 10 minutes) are set.

[0043] S4. The pipe jacking machine pushes the pipe segment body 1 into the hole. In the initial stage, the lifting structure 4 retracts the earth pressure box 202 to below the surface of the pipe segment body 1. After the initial stage, the pipe segment body 1 passes through the reinforced section and water-stop steel plate of the hole, and the lifting structure 4 pushes the earth pressure box 202 out to be flush with the surface of the pipe segment body 1.

[0044] S5. The vibrating-string frequency reader collects data from the soil pressure box 202 and the water pressure gauge 302 and transmits them to the cloud. The cloud processes and calculates the stress data in real time and compares it with the threshold set based on engineering requirements. If the threshold is exceeded, the cloud will send an early warning message to the construction monitoring computer.

[0045] S6. After the jacking construction is completed, the lifting structure 4 is removed, and then the sealing sleeve 201 and the casing 301 are grout-filled. It should be noted that before connecting the MCU acquisition unit, pay attention to connecting the ground wires of the earth pressure box 202 and the water pressure gauge 302 at the same time to avoid the influence of the high-voltage line on them.

[0046] In the above step S6, after all the pipe sections of the jacking pipe are pushed into place, the drive motor 401, the dual drive guide tube 402 and the bearing 404 are removed. Among the sleeves 201 and the sleeves 301 in the four directions of up, down, left and right, only the bottom ends of the upper sleeves 201 and the sleeves 301 need to be installed with plugs 7 (such as Figure 4 As shown), the sleeves 201 and sleeves 301 in the other three directions are directly injected with sealant using a grouting pipe 701.

[0047] Combination Figure 4 As shown, the grouting pipe 701 is lower than the exhaust pipe 702, the top of the grouting pipe 701 is close to the top surface of the plug 7, the top of the exhaust pipe 702 is close to the bottom surface of the earth pressure box 202, and the top of the exhaust pipe 702 is a bevel port to facilitate the discharge of internal air. The grouting pipe 701 is connected to the grouting pump, and the sealant is continuously filled into the sleeve 201 and the sleeve 301. The sealant is continuously increased, and the internal air is discharged from the exhaust pipe 702, so that the sealant fills the sleeve 201 and the sleeve 301.

[0048] In summary, the present invention provides a pipe joint for monitoring soil pressure and water pressure, which comprises a pipe joint body 1, a soil pressure monitoring mechanism 2 and a water pressure monitoring mechanism 3; the pipe joint body 1 is prefabricated with concrete, and a steel cage 101 for increasing strength is arranged inside the pipe joint body 1; the soil pressure monitoring mechanism 2 comprises a sleeve 201 and an earth pressure box 202, the outer wall of the pipe joint body 1 is provided with a first mounting hole 102, the sleeve 201 is arranged in the first mounting hole 102, and a steel cage 101 for increasing strength is arranged inside the sleeve 201. The lifting structure 4 connected to the pressure box 202 retracts the earth pressure box 202 to below the surface of the pipe segment body 1 during the initial stage, and pushes the earth pressure box 202 out to be flush with the surface of the pipe segment body 1 after the initial stage; the water pressure monitoring mechanism 3 includes a sleeve 301 and a water pressure gauge 302, the outer wall of the pipe segment body 1 is provided with a second mounting hole 103, the sleeve 301 is arranged in the second mounting hole 103, and the water pressure gauge 302 is arranged in the sleeve 301. The lifting structure 4 includes a driving motor 401, a dual driving guide tube 402 and a dual driving guide rod 403, the earth pressure box 202 is threadedly connected to the sleeve 201, the dual driving guide rod 403 is connected to the earth pressure box 202, the dual driving guide rod 403 is inserted into the dual driving guide tube 402, and the dual driving guide tube 402 is transmission-connected to the driving motor 401, and the transmission connection includes gear transmission or belt transmission. The lifting structure 4 also includes a bearing 404, the outer portion of which is fixedly connected to the sleeve 201, and the inner ring of which is fixedly connected to the dual-drive guide tube 402. The sleeve 201 is provided with a limit stop ring 203, and the bottom of the limit stop ring 203 is provided with a limit surface 2031 that makes the top surface of the earth pressure box 202 flush with the outer wall of the pipe segment body 1, and the limit stop ring 203 is also provided with an inclined sealing surface, and the sealing surface is provided with a rubber seal 2032. The dual-drive guide rod 403 is connected with two first support rods 4031, and the first support rod 4031 is connected with two symmetrical second support rods 4032, and the first support rod 4031 and the second support rod 4032 are both fixedly connected to the bottom surface of the earth pressure box 202, and the center lines of the first support rod 4031 and the dual-drive guide rod 403 are both in the same plane. A plurality of earth pressure monitoring mechanisms 2 are arranged along the circumference of the pipe segment body 1 and are equally spaced, and a plurality of water pressure monitoring mechanisms 3 are arranged along the circumference of the pipe segment body 1 and are equally spaced. The first mounting hole 102 and the second mounting hole 103 are axially spaced more than 10 cm apart. Before precast concrete pouring, the sleeve 201 and the sleeve 301 are welded and fixed to the steel cage 101. The steel cage 101 is fixedly connected with an axial steel strain gauge 5 and an annular steel strain gauge 6.

[0049] The present invention also provides a construction monitoring method, which uses a jacking pipe section for monitoring soil pressure and water pressure, and also includes the following method: S1 first marks the installation positions of the sleeve 201 and the sleeve 301 determined on the welded steel cage 101 in the pipe segment processing plant, then hoists the steel cage 101 into the mold, and uses the prepared concrete to pour and vibrate to form the pipe segment body 1, and the pipe segment body 1 is maintained and cooled to a predetermined strength; S2: transport the pipe segment body 1 to the pipe jacking construction site, and install the lifting structure 4, the earth pressure box 202, and the water pressure gauge 302 in the sleeve 201 and the casing 301 at the construction site; S3: First, use the lifting machinery to lift the pipe segment body 1 into the construction pit, then connect the lifting structure 4, the earth pressure box 202, and the power supply and data lines of the water pressure, and use the vibrating string frequency reading instrument to detect the operating status and initial value of the earth pressure box 202 and the water pressure gauge 302 and record them; S4 The pipe jacking machine pushes the pipe segment body 1 into the hole. In the initial stage, the lifting structure 4 retracts the earth pressure box 202 to below the surface of the pipe segment body 1. After the initial stage, the pipe segment body 1 passes through the reinforcement section of the hole, and the lifting structure 4 pushes the earth pressure box 202 out to be flush with the surface of the pipe segment body 1. The S5 vibrating-wire frequency reader collects data from the soil pressure box 202 and the water pressure gauge 302 and transmits them to the cloud. The cloud processes and calculates the stress data in real time and compares it with the threshold set based on the engineering requirements. If the threshold is exceeded, the cloud sends a warning message to the construction monitoring computer. After all the jacking construction in S6 is completed, the lifting structure 4 is removed, and then the sealing sleeve 201 and the casing 301 are grout-casted.

[0050] When grouting and sealing the top sleeve 201 and the casing 301, a plug 7 is provided, and the plug 7 is provided with a grouting pipe 701 and an exhaust pipe 702. The grouting pipe 701 is connected to a grouting pump, and the grouting pipe 701 is lower than the exhaust pipe 702, and the top of the exhaust pipe 702 is a bevel port.

[0051] Therefore, the pipe jacking section and construction monitoring method for monitoring soil pressure and water pressure provided by the present invention have the beneficial effect of protecting the measuring equipment and ensuring smooth monitoring.

[0052] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A pipe jacking section for monitoring soil pressure and water pressure, characterized in that: It comprises a pipe segment body (1), an earth pressure monitoring mechanism (2) and a water pressure monitoring mechanism (3); The pipe segment body (1) is prefabricated from concrete, and a steel cage (101) is arranged inside the pipe segment body (1) to increase strength; The soil pressure monitoring mechanism (2) comprises a sleeve (201) and a soil pressure box (202); the outer wall of the pipe segment body (1) is provided with a first mounting hole (102); the sleeve (201) is arranged in the first mounting hole (102); a lifting structure (4) connected to the soil pressure box (202) is arranged in the sleeve (201); in the initial stage, the lifting structure (4) retracts the soil pressure box (202) to below the surface of the pipe segment body (1); after the initial stage, the lifting structure (4) pushes the soil pressure box (202) out to be flush with the surface of the pipe segment body (1); The water pressure monitoring mechanism (3) comprises a sleeve (301) and a water pressure gauge (302); the outer wall of the pipe joint body (1) is provided with a second mounting hole (103); the sleeve (301) is arranged in the second mounting hole (103); and the water pressure gauge (302) is arranged in the sleeve (301). The lifting structure (4) comprises a driving motor (401), a dual-driving guide tube (402) and a dual-driving guide rod (403); the soil pressure box (202) is threadedly connected to the sleeve (201); the dual-driving guide rod (403) is connected to the soil pressure box (202); the dual-driving guide rod (403) is inserted into the dual-driving guide tube (402); the dual-driving guide tube (402) is transmission-connected to the driving motor (401); the transmission connection comprises gear transmission or belt transmission.

2. The pipe jacking section for monitoring soil pressure and water pressure according to claim 1, characterized in that: The lifting structure (4) further comprises a bearing (404), the exterior of the bearing (404) being fixedly connected to the sleeve (201), and the inner ring of the bearing (404) being fixedly connected to the dual-drive guide tube (402).

3. The jacking pipe section for monitoring soil pressure and water pressure according to claim 2, characterized in that: The sleeve (201) is provided with a limit retaining ring (203), the bottom of which is provided with a limit surface (2031) that allows the top surface of the earth pressure box (202) to be flush with the outer wall of the pipe segment body (1), and the limit retaining ring (203) is also provided with an inclined sealing surface, which is provided with a rubber sealing member (2032).

4. The pipe jacking section for monitoring soil pressure and water pressure according to claim 2, characterized in that: The dual-drive guide rod (403) is connected to two first support rods (4031), and the first support rods (4031) are connected to two symmetrical second support rods (4032). The first support rods (4031) and the second support rods (4032) are both fixedly connected to the bottom surface of the soil pressure box (202), and the center lines of the first support rod (4031) and the dual-drive guide rod (403) are both in the same plane.

5. The jacking pipe section for monitoring soil pressure and water pressure according to claim 1, characterized in that: The plurality of soil pressure monitoring mechanisms (2) are arranged along the circumference of the pipe segment body (1) at equal intervals, and the plurality of water pressure monitoring mechanisms (3) are arranged along the circumference of the pipe segment body (1) at equal intervals.

6. The pipe jacking section for monitoring soil pressure and water pressure according to claim 1, characterized in that: The first mounting hole (102) and the second mounting hole (103) are axially spaced more than 10 centimeters apart.

7. The jacking pipe section for monitoring soil pressure and water pressure according to claim 1, characterized in that: Before precast concrete is poured, the sleeve (201) and the sleeve (301) are both welded and fixed to the steel cage mesh (101).

8. The pipe jacking section for monitoring soil pressure and water pressure according to claim 1, characterized in that: The steel bar cage (101) is fixedly connected with an axial steel bar strain gauge (5) and a circumferential steel bar strain gauge (6).

9. A construction monitoring method, characterized in that: The method of using the pipe jacking section for monitoring soil pressure and water pressure as claimed in any one of claims 1 to 8 further includes the following method: S1. In the pipe segment processing plant, the installation positions of the sleeve (201) and the sleeve (301) are marked on the welded steel cage (101), and then the steel cage (101) is hoisted into a mold, and the prepared concrete is poured and vibrated to form a pipe segment body (1), and the pipe segment body (1) is maintained and cooled to a predetermined strength; S2, transporting the pipe segment body (1) to the pipe jacking construction site, and installing the lifting structure (4), the earth pressure box (202), and the water pressure gauge (302) in the sleeve (201) and the casing (301) at the construction site; S3, first use a lifting machine to lift the pipe segment body (1) into the construction pit, then connect the lifting structure (4), the earth pressure box (202), and the power supply line and data line of the water pressure, and use a vibrating string frequency reading instrument to detect the operating status and initial value of the earth pressure box (202) and the water pressure gauge (302) and record them; S4, the pipe jacking machine pushes the pipe segment body (1) into the hole, and in the initial stage, the lifting structure (4) retracts the earth pressure box (202) to below the surface of the pipe segment body (1). After the initial stage, the pipe segment body (1) passes through the reinforcement section of the hole, and the lifting structure (4) pushes the earth pressure box (202) out to be flush with the surface of the pipe segment body (1); S5, the vibrating-wire frequency reading instrument collects data from the soil pressure box (202) and the water pressure gauge (302) and transmits the data to the cloud. The cloud processes and calculates the stress data in real time and compares the data with a threshold value set based on the engineering requirements. If the threshold value is exceeded, the cloud sends a warning message to the construction monitoring computer. S6. After all the jacking construction is completed, the lifting structure (4) is removed, and then the sealing sleeve (201) and the casing (301) are grout-injected.

10. The construction monitoring method according to claim 9, characterized in that: A plug (7) is provided when the sleeve (201) and the casing (301) at the top of the grouting seal are provided, and the plug (7) is provided with a grouting pipe (701) and an exhaust pipe (702), the grouting pipe (701) is connected to a grouting pump, the grouting pipe (701) is lower than the exhaust pipe (702), and the top end of the exhaust pipe (702) is a bevel port.

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