CN-117364797-B - Bottom-up hole digging foundation assembly type retaining wall construction method

CN117364797BCN 117364797 BCN117364797 BCN 117364797BCN-117364797-B

Abstract

The invention relates to a bottom-up digging foundation assembled type retaining wall construction method which comprises the following steps of S1, digging first-section retaining wall earthwork, S2, installing a first-section retaining wall and a retaining wall chuck and assembling the first-section retaining wall and the retaining wall chuck together, S3, erecting assembled type retaining wall construction equipment, butting 3 lifting points of the first-section retaining wall with 3 lifting wires of a 3-motor-driven grinding machine of the assembled type retaining wall construction equipment, S4, digging second-section retaining wall earthwork, S5, installing the second-section retaining wall on the upper part of the first-section retaining wall and connecting the second-section retaining wall with the first-section retaining wall, S6, disassembling the first-section retaining wall and the retaining wall chuck, starting the assembled type retaining wall construction equipment, releasing the lifting wires to enable the first-section retaining wall and the second-section retaining wall to integrally settle, S7, assembling the retaining wall chuck and the second-section retaining wall after the first-time settlement is completed, and repeating the method of the steps S4-S7 to perform circulating operation until all the retaining walls are installed in place. The method can effectively reduce construction difficulty and operation risk, improve construction efficiency and improve construction quality.

Inventors

YU XINMIN
CHENG JIANPING
Wang Xianri
LIU ZHIWEI
CHEN XIANG
Nie Kejian
CHEN XINGYUN
LIN JIANHAO
LIN RUIZONG

Assignees

国网福建省电力有限公司经济技术研究院
国网福建省电力有限公司

Dates

Publication Date: 20260508
Application Date: 20231019

Claims (6)

1. The bottom-up hole digging foundation assembly type retaining wall construction method is characterized by comprising the following steps of: s1, excavating first section of retaining wall earthwork to a designed diameter and depth; S2, installing a first section of retaining wall, and then installing a retaining wall chuck and assembling the retaining wall chuck and the first section of retaining wall together; S3, erecting assembled wall protection construction equipment, wherein the assembled wall protection construction equipment comprises 3 electric wringing mills, then 3 lifting points of the assembled first section of wall protection are abutted with 3 lifting wires of the 3 electric wringing mills, and the lifting wires are tightened, and at the moment, the weight of the first section of wall protection is supported by the 3 lifting wires of the 3 electric wringing mills and the wall protection chuck of the assembled wall protection construction equipment; s4, excavating the second section of retaining wall earthwork to the designed diameter and depth; S5, installing a second section of protection wall on the upper part of the first section of protection wall, and connecting the second section of protection wall with the first section of protection wall up and down by using a clamping ring, wherein the weights of the first section of protection wall and the second section of protection wall are simultaneously supported by 3 hanging wires and protection wall chucks of 3 electric wringing mills of the assembled protection wall construction equipment; S6, disconnecting the first section of the retaining wall from the retaining wall chuck, wherein the weight of the first section of the retaining wall and the weight of the second section of the retaining wall are born by 3 hanging wires of 3 electric wringing mills of the assembled retaining wall construction equipment together at the moment; S7, after the first sedimentation is finished, the first section of retaining wall is sunk to the pit bottom, and the second section of retaining wall is positioned at the original position of the first section of retaining wall at the pit mouth; S8, repeatedly excavating the earthwork of the retaining wall, installing the retaining wall, removing the retaining wall, wholly settling the retaining wall, reinstalling the retaining wall chuck according to the method of the steps S4-S7, and performing cyclic operation until all the retaining walls are installed in place; The wall protection chuck comprises an annular chuck and a plurality of telescopic bolts which are arranged on the inner side surface of the annular chuck and can radially move, the telescopic bolts are inserted into reserved holes of the assembled wall protection chuck and support the reserved holes, guide grooves for accommodating the telescopic bolts are formed in the inner side surface of the annular chuck, guide rails which are used for being in sliding fit with the telescopic bolts are arranged on the inner bottom surface of the guide grooves, limit pulleys are symmetrically arranged on the inner side surface of the guide grooves, tooth groove portions are arranged on the top of the telescopic bolts, mounting grooves are formed in the surface of the annular chuck, rotating gears which are meshed with the tooth groove portions are arranged in the mounting grooves and used for driving the telescopic bolts to radially move, and the inner side surface of the guide grooves is connected with the limit pulleys through limit rods.
2. The bottom-up hole digging foundation assembling type dado construction method according to claim 1, wherein each section of dado comprises three dado pieces, and the three dado pieces are connected through bolts.
3. The bottom-up hole digging foundation assembled dado construction method according to claim 1, wherein during the cyclic operation, every other two sections of dado are uniformly driven into the reserved holes on one section of dado to serve as another safety positioning except for the dado chuck and the hanging wire of the assembled dado construction equipment in the construction of the dado.
4. The bottom-up hole digging foundation assembled retaining wall construction method according to claim 1, wherein the assembled retaining wall construction equipment is provided with a tension sensor for detecting the tension of hanging wires, and the assembled retaining wall construction equipment continuously adjusts the lifting of one or two hanging points in the lifting process according to the tension of 3 hanging wires collected by the tension sensor, so that the tension of the 3 hanging wires is balanced, and the integral retaining wall is always kept vertical.
5. The bottom-up hole digging foundation assembly type dado construction method according to claim 1, wherein the annular chuck is formed by splicing and encircling a plurality of arc chucks, adjacent arc chucks are fixed through connecting bolts, and each arc chuck comprises an outer arc support piece, an inner arc support piece and a connecting support piece for connecting the inner arc support piece and the outer arc support piece.
6. The bottom-up hole digging foundation fabricated dado construction method according to claim 1 wherein said annular chuck bottom is provided with a plurality of reinforcing square steels, each corresponding to a position below the telescoping latch.

Description

Bottom-up hole digging foundation assembly type retaining wall construction method Technical Field The invention relates to the technical field of wall protection construction, in particular to a bottom-up hole digging foundation assembly type wall protection construction method. Background The existing retaining wall construction technology adopts the modes of manually or mechanically excavating the aperture to a certain depth, supporting the mould, casting concrete in situ, curing until reaching the standard strength, and then continuing downwards excavating the hole, supporting the mould and curing. In the process, the formwork is cast in place on the pit, the operation of constructors is difficult, the wall protection forming precision is poor, the concrete maintenance is difficult, and the engineering quality is difficult to guarantee. The next section can be performed after the solidification of the section, and the construction period is long. If the cast-in-place concrete retaining wall is not maintained in place or the solidification time is insufficient, the concrete retaining wall is easy to collapse along with the increase of the excavation depth, and the risk of constructors is high. Disclosure of Invention The invention aims to provide a bottom-up hole digging foundation assembly type wall protection construction method which can effectively reduce construction difficulty and operation risk, improve construction efficiency and improve construction quality. In order to achieve the purpose, the invention adopts the technical scheme that the method for constructing the assembled retaining wall of the hole digging foundation from bottom to top comprises the following steps: s1, excavating first section of retaining wall earthwork to a designed diameter and depth; S2, installing a first section of retaining wall, and then installing a retaining wall chuck and assembling the retaining wall chuck and the first section of retaining wall together; S3, erecting assembled wall protection construction equipment, wherein the assembled wall protection construction equipment comprises 3 electric wringing mills, then 3 lifting points of the assembled first section of wall protection are abutted with 3 lifting wires of the 3 electric wringing mills, and the lifting wires are tightened, and at the moment, the weight of the first section of wall protection is supported by the 3 lifting wires of the 3 electric wringing mills and the wall protection chuck of the assembled wall protection construction equipment; s4, excavating the second section of retaining wall earthwork to the designed diameter and depth; S5, installing a second section of protection wall on the upper part of the first section of protection wall, and connecting the second section of protection wall with the first section of protection wall up and down by using a clamping ring, wherein the weights of the first section of protection wall and the second section of protection wall are simultaneously supported by 3 hanging wires and protection wall chucks of 3 electric wringing mills of the assembled protection wall construction equipment; S6, disconnecting the first section of the retaining wall from the retaining wall chuck, wherein the weight of the first section of the retaining wall and the weight of the second section of the retaining wall are born by 3 hanging wires of 3 electric wringing mills of the assembled retaining wall construction equipment together at the moment; S7, after the first sedimentation is finished, the first section of retaining wall is sunk to the pit bottom, and the second section of retaining wall is positioned at the original position of the first section of retaining wall at the pit mouth; s8, repeatedly excavating the earthwork of the retaining wall, installing the retaining wall, removing the retaining wall, wholly settling the retaining wall, reinstalling the retaining wall chuck according to the method of the steps S4-S7, and performing cyclic operation until all the retaining walls are installed in place. Further, each section of the retaining wall comprises three retaining wall pieces which are connected through bolts. Further, in the process of cyclic operation, a plurality of steel drills are uniformly driven into reserved holes on one section of the retaining wall every two sections of the retaining wall to serve as safe positioning of the retaining wall except the retaining wall chuck and the hanging wire of the assembled retaining wall construction equipment in retaining wall construction. Further, a tension sensor for detecting the tension of the hanging wire is arranged on the assembled wall protection construction equipment, and the assembled wall protection construction equipment continuously adjusts the lifting of one or two hanging points in the lifting process according to the tension of 3 hanging wires collected by the tension sensor, so that the tension of 3 hanging wires is balanced, and the assemb