CN-121976510-A - Soil pressure monitoring and early warning equipment in MJS construction method construction

CN121976510ACN 121976510 ACN121976510 ACN 121976510ACN-121976510-A

Abstract

The invention relates to the technical field of foundation reinforcement, in particular to soil pressure monitoring and early warning equipment in MJS construction method construction, which comprises a drilling machine, a winch, a steel rope, a drill rod, a drill bit, a sleeve and a monitoring part, and can solve the problems that cement slurry can only be sprayed in a straight line upward movement manner in the process of grouting reinforcement of foundation soil, cement slurry can not be uniformly distributed to affect the reinforcement effect of the soil, the soil pressure of the side wall of a pile hole can not be monitored to cause lack of controllability in the construction process, cement slurry can be uniformly diffused by a multi-pipe jet grouting pile technology, stratum settlement can be effectively avoided, the reinforcement effect is obvious, and the soil pressure of the side wall of the jet grouting hole can be comprehensively monitored in multiple directions in the drilling and grouting processes, so that the controllability in the construction process is ensured.

Inventors

ZHAO XIAOJUN
ZHOU ZHIYONG
ZHANG ZHIYAO
LI DA
GUO ZHIPENG
HUANG BINGHAO
YANG XIAODONG
LIU WEI

Assignees

中铁十五局集团有限公司

Dates

Publication Date: 20260505
Application Date: 20250324

Claims (10)

1. The utility model provides an earth pressure monitoring early warning equipment in MJS worker method construction, includes rig (1), and rig (1) one side is through mounting has hoist engine (2), and a plurality of assembly pulleys are installed along length direction equidistance to the support upper end, installs a plurality of cable wires (3) corresponding with the assembly pulley position on hoist engine (2), installs drilling rod (4) after the one end that hoist engine (2) was kept away from to cable wire (3) is walked around the assembly pulley, drill bit (5) are installed to drilling rod (4) lower extreme, its characterized in that: The outer wall sleeve of drilling rod (4) is equipped with sleeve (6) that are located drill bit (5) top, and monitoring portion (7) that are used for monitoring spouting stake hole lateral wall soil pressure are installed to sleeve (6) outer wall, and monitoring portion (7) are installed at inside vertical slide bar (71) of sleeve (6) including a plurality of week Xiang Junyun, and one side that vertical slide bar (71) kept away from drilling rod (4) is provided with a plurality of executions (72) from top to bottom equidistance distribution.
2. The soil pressure monitoring and early warning device in MJS construction method construction according to claim 1, wherein a supporting block (41) is arranged at the upper end of the drill rod (4), a connecting cavity is formed in the supporting block (41), the drill rod (4) is hollow and cylindrical and is communicated with the connecting cavity, the drill bit (5) consists of a mounting plate (51) and a reamer (52), the mounting plate (51) is arranged at the lower end of the drill rod (4), a plurality of evenly distributed reamers (52) are evenly arranged at the lower end of the mounting plate (51), a plurality of spraying holes (53) communicated with the interior of the drill rod (4) are formed in the mounting plate (51), and the spraying holes (53) and the reamers (52) are distributed in a staggered mode.
3. The soil pressure monitoring and early warning device in MJS construction method construction according to claim 1, wherein the monitoring part (7) further comprises a plurality of through holes (74) which are formed in the sleeve (6) and correspond to the positions of the executing pieces (72), the executing pieces (72) comprise a plurality of displacement blocks (721) which respectively slide through the plurality of through holes (74), one end, far away from the vertical sliding rod (71), of each displacement block (721) is provided with an upright plate (722), a plurality of side walls of each upright plate (722) are provided with folded edges (723), opposite sides of the folded edges (723) in two vertical directions of the same upright plate (722) are symmetrically rotatably provided with abutting rollers (724), and an adjusting unit (75) for adjusting the distance between the plurality of executing pieces (72) on the same vertical sliding rod (71) is arranged between the vertical sliding rod (71) and the displacement blocks (721).
4. The soil pressure monitoring and early warning device in MJS construction method construction as set forth in claim 3, wherein a folding baffle plate (76) is mounted on the inner wall of the through hole (74), the displacement block (721) slides through the folding baffle plate (76), and the vertical plate (722) is located on one side of the displacement block (721) far away from the vertical sliding rod (71).
5. The soil pressure monitoring and early warning device in MJS construction method construction as set forth in claim 3, wherein the executing piece (72) further comprises a plurality of linkage blocks (725) arranged on one side of the vertical sliding rod (71) close to the displacement blocks (721), the plurality of linkage blocks (725) correspond to the plurality of displacement blocks (721) in position, and supporting springs (726) are arranged on the opposite sides of the corresponding linkage blocks (725) and the displacement blocks (721); The opposite sides of the displacement block (721) and the linkage block (725) are respectively provided with an electrode column (727) and a contact pad (728), an annular plate (729) is arranged between the sleeve (6) and the outer wall of the drill rod (4), a controller (730) and a signal receiver (731) which are electrically connected with each other are arranged at the upper end of the annular plate (729), and the contact pad (728) is electrically connected with the controller (730).
6. The soil pressure monitoring and early warning device in MJS construction method construction as set forth in claim 1, wherein the outer wall of the drill rod (4) is sleeved with a plurality of rotating rings (42) which are distributed in a staggered manner with the executing pieces (72) from top to bottom, a plurality of protruding blocks (43) which are distributed in a staggered manner with the vertical sliding rods (71) are arranged on the outer wall of the rotating rings (42), and a plurality of reset elastic pieces (44) are arranged between the vertical sliding rods (71) and the inner side wall of the sleeve (6).
7. The device for monitoring and early warning the soil pressure in MJS construction is characterized in that a plurality of groups of arc racks (45) corresponding to the positions of the convex blocks (43) are arranged on the outer wall of the rotary ring (42), each group of arc racks (45) are vertically and symmetrically distributed along the convex blocks (43), a plurality of driving motors (46) corresponding to the positions of the convex blocks (43) are arranged on the outer wall of the drill rod (4) through a motor base, a rotating shaft (47) is arranged on an output shaft of the driving motor (46), and a plurality of gears (48) meshed with the arc racks (45) are sleeved on the outer wall of the rotating shaft (47).
8. The device for monitoring and early warning the soil pressure in MJS construction method construction as set forth in claim 5, wherein the adjusting unit (75) comprises a plurality of limiting sliding grooves (751) which are arranged in the vertical sliding rod (71) and correspond to the linkage blocks (725), reciprocating blocks (752) connected with the linkage blocks (725) are slidably arranged in the limiting sliding grooves (751), adjusting screws (753) parallel to the length direction of the adjusting screws (753) are rotatably arranged on the vertical sliding rod (71), and the adjusting screws (753) penetrate through the reciprocating blocks (752) in a threaded connection mode.
9. The soil pressure monitoring and early warning device in MJS construction method construction as set forth in claim 8, wherein a plurality of groups of transmission threads corresponding to the positions of the reciprocating blocks (752) are formed on the outer wall of the adjusting screw (753) from top to bottom at equal intervals, the pitch of the transmission threads of the same adjusting screw (753) is gradually reduced from top to bottom, and the heights of the limiting sliding grooves (751) of the same vertical sliding rod (71) are gradually reduced from top to bottom.
10. The soil pressure monitoring and early warning device in MJS construction method construction as set forth in claim 8, wherein the upper end of the sleeve (6) is provided with a sliding hole, the adjusting screw (753) extends to the upper part of the sleeve (6) after passing through the sliding hole, and a plurality of protective covers (62) covering the sliding hole are clamped at the upper end of the sleeve (6).

Description

Soil pressure monitoring and early warning equipment in MJS construction method construction Technical Field The invention relates to the technical field of foundation reinforcement, in particular to soil pressure monitoring and early warning equipment in MJS construction method construction. Background Along with the continuous development of the underground space, the bearing capacity of the soil body of the underground space in a soft soil area is weaker, and the soil body is sensitive to construction disturbance, so that the safety of middle and peripheral buildings and pipeline roads manufactured by construction is ensured, the ground subsidence or structural damage caused by the construction is avoided, and the soil body is a key problem to be solved in engineering urgently. The prior MJS construction method drills a certain depth into the soil body through a drill bit, then sprays materials such as cement slurry and the like into the soil body through high pressure, and fully mixes the materials with the soil body to form a columnar reinforcing body with certain strength and stability, so that the soft soil foundation can be effectively reinforced and improved, and in order to ensure the stability and controllability in the construction process, the soil pressure needs to be monitored in real time while the cement slurry is sprayed, so that the normal operation of foundation reinforcement is ensured. However, when the MJS construction method is adopted to perform foundation reinforcement at present, a lot of problems usually exist, along with development of technology, a person skilled in the relevant field also performs a lot of improvement on soil reinforcement, in order to perform more accurate comparison, for example, chinese patent publication No. CN117267676a discloses a self-drilling aerated lightweight cement soil MJS device and a construction method thereof, the self-drilling aerated lightweight cement soil MJS device comprises a porous pipe, an integrated device, a reamer head, a pressure monitoring system, a quality measuring instrument and a console, the pressure monitoring system comprises a pressure sensor and an acquisition instrument, the porous pipe, the integrated device and the reamer head are connected from top to bottom to form a drill rod main body, the integrated device is a sleeve-type integrated device, and is sleeved at the lower part of the porous pipe, and a high-pressure water spray port, a mud discharge port, a high-pressure grouting port and a pressure sensor are arranged on the wall of the cylinder from top to bottom. When the drilling system is used, the drilling system controls the reamer head to drill holes to a designed depth through the drill rod, then the high-pressure water spray opening is used for spraying high-pressure water to cut soil, the high-pressure grouting opening is used for spraying high-pressure cement slurry to perform grouting reinforcement, the drill rod is lifted in a rotating mode at a certain speed, the high-pressure water spray opening and the high-pressure grouting opening are used for continuously performing high-pressure water cutting soil and high-pressure grouting reinforcement operation respectively, in the soil cutting process, the pressure sensor is used for transmitting soil and water pressure data to the control console through the acquisition instrument, the opening and closing degree of the valve of the soil discharge opening is adjusted through the control console, the discharged high-pressure cement slurry and high-pressure water are controlled, and the soil and water pressure of a reinforced area is kept constant. However, the above prior art has some disadvantages in the process of grouting reinforcement of the foundation soil body: 1. The prior art can only carry out grouting reinforcement in one pile hole at a time through the porous pipe and the integrated device, and in the grouting process, the integrated device controls the high-pressure grouting port to linearly move upwards, so that cement paste sprayed in the upward moving process of the high-pressure grouting port can only be downwards and freely piled up in the pile hole, uniform distribution of the cement paste cannot be ensured, stratum is easy to subside under the action of pile hole collapse, bubbles are easy to generate in the cement paste, and the reinforcement effect on soil mass is influenced. 2. Because the soil body in the drilled pile hole easily applies pressure to the center of the pile hole, namely the hole wall bears the extrusion force of the soil body from outside to inside, if the foundation is a soft soil layer, the drilled pile hole is easy to collapse to influence the normal operation of engineering, but the opening and closing degree of a valve of a mud discharging port can only be adjusted in the prior art, the soil pressure of the side wall of the pile hole cannot be monitored in all directions, and cement paste cannot be quickly solidified