CN-121976542-A - Foundation pit structure construction method

CN121976542ACN 121976542 ACN121976542 ACN 121976542ACN-121976542-A

Abstract

The invention relates to a foundation pit structure construction method which comprises the following steps of firstly, carrying out on-site manufacturing procedures, drilling underground grooves, carrying out on-site manufacturing on reinforcement cages, dynamically detecting the reinforcement cages by a detection mechanism, simultaneously assisting in installing a plurality of first sensors on the reinforcement cages, secondly, carrying out positioning and installing procedures, carrying out dynamic detection by the detection mechanism, carrying out lifting and adjusting on the installation positions of the first sensors in a matching manner, carrying out drilling of a plurality of measuring holes by the detection mechanism, simultaneously assisting in installing a second sensor in each measuring hole by the installation mechanism, and thirdly, carrying out pile casting procedures, carrying out deformation adjustment on the reinforcement cages by the punching mechanism, carrying out maintenance stress on the reinforcement cages by the support cushion blocks by the installation mechanism, and carrying out real-time adjustment on the position and speed of cement pile casting under the monitoring of the first sensors and the second sensors. The invention solves the problems of large manpower consumption, low construction efficiency, unreasonable process and error of monitoring data in the foundation pit construction process.

Inventors

CHEN JIA
YE RIHUI
HUANG WEI
SHI CHUNLIANG
LANG JIANGUO
ZHOU HAIQUAN

Assignees

浙江天和建筑设计有限公司

Dates

Publication Date: 20260505
Application Date: 20260116

Claims (10)

1. The construction method of the foundation pit structure is characterized by comprising the following steps of: The method comprises the steps of firstly, performing on-site manufacturing, namely drilling an underground groove according to a design drawing, performing on-site manufacturing on a reinforcement cage, and then movably mounting a detection mechanism in the reinforcement cage, wherein the detection mechanism dynamically detects each connecting position on the reinforcement cage, and simultaneously, the detection mechanism is assisted to move along with a mounting mechanism and a plurality of first sensors are mounted on the reinforcement cage at intervals; Positioning and installing, namely positioning and lifting the reinforcement cage into the underground tank under the action of a positioning cushion block on the reinforcement cage, wherein after the detection mechanism dynamically detects and coordinates with lifting to adjust the installation position of the first sensor, the detection mechanism is matched with the punching mechanism to move along with the detection mechanism and positions and drills a plurality of measuring holes on the inner wall of the underground tank, and meanwhile, the installation mechanism is matched with the installation mechanism to install a second sensor in each measuring hole; And thirdly, a pile casting process, wherein the detection mechanism moves into the reinforcement cage and is matched with the punching mechanism to support the reinforcement cage through the inner wall of the underground groove to adjust stress, and meanwhile, the installation mechanism is used for installing a supporting cushion block to support the reinforcement cage to maintain stress, and then the position and the speed of cement casting pile casting are adjusted in real time under the monitoring of the first sensor and the second sensor.
2. The foundation pit structure construction method of claim 1, wherein the detection mechanism comprises a supporting seat, a collector arranged on the supporting seat, a moving assembly arranged on the supporting seat in a telescopic manner and a connecting assembly arranged on the moving assembly; after the moving assembly stretches to be matched with the inner diameter of the reinforcement cage and is connected and installed through the connecting assembly, the supporting seat supports the collector to move along with the moving assembly and collect and detect all the connecting positions of the reinforcement cage.
3. The method according to claim 2, wherein the moving assembly comprises a plurality of first folding frames rotatably arranged on the supporting base at intervals, a second folding frame arranged on the supporting base and positioned between two adjacent first folding frames, rollers rotatably arranged on the first folding frames and the second folding frames, and a connecting groove formed on the outer wall of the rollers; the roller is matched with the connecting groove to be connected to the reinforcement cage in a rolling mode, the first folding frame is stretched to be matched with the inner diameter of the reinforcement cage, and the supporting seat is supported in the reinforcement cage in a matched mode through stretching of the second folding frame.
4. A method of constructing a pit structure according to claim 3, wherein the connecting assembly comprises a connecting seat movably and rotatably provided on the moving assembly, a stopper arm movably provided on the connecting seat, and a connecting arm provided on the stopper arm; the limiting arm rotates to the outer side of the steel reinforcement framework along with the connecting seat, and after the limiting arm moves to limit the position between the steel reinforcement framework and the roller, the connecting arm moves along with the connecting seat to connect the steel reinforcement framework in the connecting groove.
5. The foundation pit structure construction method of claim 1, wherein the mounting mechanism comprises a mounting seat rotatably arranged on the detection mechanism, a feeding assembly arranged on the mounting seat, and a mounting assembly telescopically and rotatably arranged on the mounting seat; After the installation seat is rotated to adjust the positions of the feeding assembly and the installation assembly, the feeding assembly is matched with the expansion and rotation of the installation assembly to carry out positioning feeding and positioning installation.
6. The method according to claim 5, wherein the loading assembly comprises a conveyor belt arranged on the mounting base, a trough arranged on the conveyor belt at intervals, a clamping plate rotatably arranged in the trough, a pushing rod movably arranged on the conveyor belt and an elastic piece arranged on the conveyor belt; the elastic piece forces the clamping plate to clamp the raw material in the trough, and after the raw material is conveyed to the installation assembly through the conveyor belt, the installation assembly forces the pushing rod to push the clamping plate to be separated from the raw material.
7. The method according to claim 6, wherein the mounting assembly comprises a third folding frame arranged on the mounting base, a push plate arranged on the third folding piece, a mounting arm rotatably arranged on the third folding frame, and two clamping arms which are opened and closed on the mounting arm; The third folding frame is preliminarily folded and matched with the mounting arm to rotate and adjust the position of the clamping arm, so that after the clamping arm is closed to clamp raw materials, the third folding arm is further folded and matched with the pushing plate to push the pushing rod, and then the third folding arm stretches and withdraws raw materials and is matched with the rotation of the mounting arm to mount the raw materials.
8. The foundation pit structure construction method of claim 1, wherein the punching mechanism comprises a fourth folding frame rotatably arranged on the mounting seat, a telescopic frame arranged on the fourth folding frame, and a drill bit rotatably arranged on the telescopic frame; After the fourth folding frame is rotated and stretched to adjust the position of the drill bit, the telescopic frame stretches to force the rotating drill bit to punch holes.
9. The foundation pit structure construction method of claim 1, further comprising the steps of: And fourthly, slope protection forming, namely, digging a foundation pit according to a design drawing, installing a reinforcing mesh on a slope, installing a first sensor and a second sensor on the reinforcing mesh and in the slope respectively for monitoring, adjusting the position and the speed of subsequent cement injection in real time until the slope protection is formed, and then suspending the detection mechanism through a suspension mechanism and installing a third sensor on the cement pile and the slope protection surface in cooperation with the installation mechanism.
10. The foundation pit structure construction method of claim 9, wherein the suspension mechanism comprises a cable connected to the detection mechanism, a winding roller connected to the cable, a plurality of support rods arranged on the winding roller in a telescopic manner, a connecting plate arranged on the winding roller and a support roller arranged on the winding roller in a rotary manner; The support rod supports the wind-up roll to move until the connecting plate is connected with the inner wall of the slope protection, and the support roll supports the cable to be led out from the wind-up roll and suspends the detection mechanism on the outer wall of the slope protection.

Description

Foundation pit structure construction method Technical Field The invention relates to the technical field of foundation pit construction, in particular to a foundation pit structure construction method. Background The foundation pit is simply a soil pit excavated on the ground for constructing an underground structure, provides a construction space for the underground structures such as a foundation, a basement, an underground parking lot, a subway station and the like of a building, ensures that surrounding soil bodies cannot collapse when the underground structure is constructed, and provides a stable and safe working environment for subsequent engineering. The patent document with the patent number of CN120537243A discloses a construction method for automatically monitoring an ultra-deep underground continuous wall in the whole process of a strong permeable stratum, and aims at solving the problems that the ultra-deep underground continuous wall in the strong permeable stratum is low in construction precision, easy to collapse, lack of real-time monitoring and the like through the cooperation of five technical systems, wherein (1) a blocking wall technical system adopts a lower hanging beam, a reserved post-pouring belt and a inverted bracket structure to enhance impermeability, (2) a detachable reinforcement cage supporting system supports and improves rigidity and hoisting safety through a modularized truss, (3) a perpendicularity ultrasonic detection system realizes high-precision detection of a guide wall through an ultrasonic signal, (4) a section steel wall-attached inner supporting frame system prevents cracking through adjustable supporting, and (5) an automatic monitoring system integrates multi-sensor real-time monitoring displacement, temperature and cloud early warning. The invention obviously improves the construction efficiency and quality through multi-technology fusion, is suitable for the construction of ultra-deep underground continuous walls under complex geological conditions, and has the advantages of strong impermeability, controllable deformation, real-time early warning and the like. In the actual foundation pit construction process, however, the inventor finds that the existing monitoring method has the following problems that the traditional monitoring means has high manpower consumption, high manpower cost, large human error, low automation degree and low monitoring construction efficiency, and in addition, the installation and arrangement process of the monitoring points is complex, so that the monitoring progress is often influenced, particularly the installation process is unreasonable when the monitoring structure in the underground groove is installed, the space is narrow, the operation is inconvenient, the reinforcement cage is easy to install in place and difficult to adjust, the error exists in the reinforcement monitoring data, the contact between the soil body and the detection structure inside the soil body is easy to be inconsistent, and the measured value is unstable and has errors. Disclosure of Invention The invention aims at overcoming the defects of the prior art, and by arranging the on-site manufacturing process, the positioning and mounting process and the pouring pile forming process and matching with the movable detection mechanism, the mounting mechanism and the punching mechanism, the automation, high precision and traceability of the arrangement of the first sensor and the second sensor are realized, the manpower consumption is reduced, the monitoring data are comprehensive and accurate, meanwhile, the structure detection, the deformation control and the stress adjustment are automatically carried out on the reinforcement cage before and during the cement pouring, the stress monitoring is carried out from the traditional process control from the front of the later health diagnosis to the construction period, the process is reasonable, the construction efficiency is further improved, and the optimal initial state of the inner framework of the cement pile is ensured. Therefore, the problems of large manpower consumption, low construction efficiency, unreasonable process and error of monitoring data in the foundation pit construction process are solved. Aiming at the technical problems, the technical scheme is as follows, the foundation pit structure construction method comprises the following steps: The method comprises the steps of firstly, performing on-site manufacturing, namely drilling an underground groove according to a design drawing, performing on-site manufacturing on a reinforcement cage, and then movably mounting a detection mechanism in the reinforcement cage, wherein the detection mechanism dynamically detects each connecting position on the reinforcement cage, and simultaneously, the detection mechanism is assisted to move along with a mounting mechanism and a plurality of first sensors are mounted on the reinforcement cage at intervals; Po