CN-121990738-A - In-situ modification and solidification system and process for coastal cement soil

CN121990738ACN 121990738 ACN121990738 ACN 121990738ACN-121990738-A

Abstract

The invention discloses a coastal cement soil in-situ modification and solidification system which comprises an in-situ solidification execution unit at the lower end of a mechanical arm, wherein the in-situ solidification execution unit comprises a stirring head driving seat fixedly arranged at the lower end of the mechanical arm, a first stirring rotary stirring head and a second stirring rotary stirring head are symmetrically arranged on two sides of the stirring head driving seat, a curing agent grouting head is arranged on the stirring head driving seat, and a first vertical fluctuation plate and a second vertical fluctuation plate which can do swinging motion are respectively arranged on two sides of a combined structure formed by the first stirring rotary stirring head and the second stirring rotary stirring head. Solves the problem of difficult control of integral homogenization in the in-situ solidification of the large-scale coastal sludge.

Inventors

FU JIAJIA
XU GUIZHONG
WANG WEI
WANG ZHAOYU
DING JINHUA
CHEN JI

Assignees

盐城工业职业技术学院
绍兴文理学院
盐城工学院

Dates

Publication Date: 20260508
Application Date: 20260304

Claims (8)

1. The coastal cement soil in-situ modification and solidification system is characterized by comprising an in-situ solidification execution unit (62) at the lower end of a mechanical arm (1), wherein the in-situ solidification execution unit (62) comprises a stirring head driving seat (2) fixedly arranged at the lower end of the mechanical arm (1), a first stirring rotary stirring head (20 a) and a second rotary stirring head (20 b) are symmetrically arranged at two sides of the stirring head driving seat (2), and a curing agent grouting head (18) is arranged on the stirring head driving seat (2); the two sides of the combined structure formed by the first stirring rotary stirring head (20 a) and the second stirring rotary stirring head (20 b) are respectively provided with a first vertical fluctuation plate (12 a) and a second vertical fluctuation plate (12 b) which can do swinging motion.
2. The coastal cemented soil in-situ modification and solidification system according to claim 1 is characterized in that the geometric centers of the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) are hollowed and provided with transverse hollowed grooves (5), and the middle heights of the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) are respectively and integrally provided with a transverse first swinging shaft (13 a) and a transverse second swinging shaft (13 b); A first support arm (14 a) and a second support arm (14 b) are integrally arranged on one side, close to a first vertical fluctuation plate (12 a) and a second vertical fluctuation plate (12 b), of a stirring head driving seat (2), a pendulum shaft penetrating hole (51) of a transverse pipe body is formed in the tail ends of the first support arm (14 a) and the second support arm (14 b), a first pendulum shaft (13 a) coaxially rotates to penetrate through the pendulum shaft penetrating hole (51) on the first support arm (14 a), a second pendulum shaft (13 b) coaxially rotates to penetrate through the pendulum shaft penetrating hole (51) on the second support arm (14 b), and accordingly the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) swing around the axes of the first pendulum shaft (13 a) and the second pendulum shaft (13 b) respectively under the support of the first support arm (14 a) and the second support arm (14 b).
3. The in-situ modification and solidification system for the coastal cement soil, as claimed in claim 1, is characterized in that a first screw blade (21 a) and a second screw blade (21 b) are integrally arranged on the periphery of a first stirring rotary stirring head (20 a) and the periphery of a second stirring rotary stirring head (20 b), and stirring piles (22) are arranged on the first screw blade (21 a) and the second screw blade (21 b) along the extending direction of the blades.
4. The system for in-situ modification and solidification of littoral soil according to claim 1, wherein the first stirring rotary stirring head (20 a) and the second stirring rotary stirring head (20 b) are obliquely downward, and the axis of the first stirring rotary stirring head (20 a) and the axis of the second stirring rotary stirring head (20 b) form an obtuse angle.
5. The coastal cemented soil in-situ modification and solidification system according to claim 2, further comprising a first bottom fluctuation plate (16 a) and a second bottom fluctuation plate (16 b) which are bilaterally symmetrical, wherein one end of the first bottom fluctuation plate (16 a) and one end of the second bottom fluctuation plate (16 b) which are close to each other are hinged through a central hinge (3), and one end of the first bottom fluctuation plate (16 a) and one end of the second bottom fluctuation plate (16 b) which are far away from each other are respectively hinged with the lower ends of the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) through a left lower hinge (15 a) and a right lower hinge (15 b); in the initial state, the central hinge (3) is lower than the left lower hinge (15 a) and the right lower hinge (15 b), and further comprises a first upper oblique wave moving plate (10 a) and a second upper oblique wave moving plate (10 b) which are bilaterally symmetrical, wherein the first upper oblique wave moving plate (10 a) and the second upper oblique wave moving plate (10 b) are in an eight shape, the upper parts of the first upper oblique wave moving plate and the second upper oblique wave moving plate are close to each other, and the lower parts of the first upper oblique wave moving plate and the second upper oblique wave moving plate are far away from each other; the lower ends of the first upper inclined wave plate (10 a) and the second upper inclined wave plate (10 b) are respectively hinged with the upper ends of the first vertical wave plate (12 a) and the second vertical wave plate (12 b) through a first upper left hinge (11 a) and a second upper right hinge (11 b); The upper ends of the first upper inclined wave moving plate (10 a) and the second upper inclined wave moving plate (10 b) are respectively in running fit on the first lifting hinge seat (9 a) and the second lifting hinge seat (9 b) through a first hinge shaft (47 a) and a second hinge shaft (47 b).
6. The in-situ modification and solidification system for the coastal cement soil according to claim 5, wherein a first group of hydraulic retractors (7 a) and a second group of hydraulic retractors (7 b) which extend downwards are fixedly arranged on two sides of the mechanical arm (1) through a first support (6 a) and a second support (6 b) respectively; the lower ends of a first group of telescopic rods (8 a) and a second group of telescopic rods (8 b) of the first group of hydraulic retractors (7 a) and the second group of hydraulic retractors (7 b) are respectively and fixedly connected with a first lifting hinging seat (9 a) and a second lifting hinging seat (9 b); The first upper inclined fluctuation plate (10 a), the second upper inclined fluctuation plate (10 b), the first vertical fluctuation plate (12 a), the second vertical fluctuation plate (12 b), the first bottom fluctuation plate (16 a) and the second bottom fluctuation plate (16 b) surround areas to form a transverse and through dynamic mixing groove (4), and the first stirring rotary stirring head (20 a) and the second stirring rotary stirring head (20 b) are both arranged in the dynamic mixing groove (4).
7. The working method of the coastal cemented soil in-situ modification and solidification system according to claim 6, which is characterized in that: Step one, on the basis of an initial state, synchronously controlling the first group of hydraulic retractors (7 a) and the second group of hydraulic retractors (7 b) to synchronously displace downwards the first lifting hinge seat (9 a) and the second lifting hinge seat (9 b), wherein the downwards displaced first lifting hinge seat (9 a) and the downwards displaced second lifting hinge seat (9 b) respectively push the upper ends of the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) to mutually far away through the first upper inclined fluctuation plate (10 a) and the second upper inclined fluctuation plate (10 b), so that the upper ends of the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) swing around the first swinging shaft (13 a) and the second swinging shaft (13 b) respectively, and further the left lower hinge (15 a) and the right lower hinge (15 b) of the lower ends of the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) move mutually close to each other, the left lower hinge (15 a) and the right lower hinge (15 b) move mutually close to each other relatively to the center hinge (3), the first bottom fluctuation plate (16 a) and the second bottom fluctuation plate (16 b) which are originally horizontal are converted into downward sharp corner structures (58), the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) are changed into inclined planes with the lower ends close to each other, and the in-situ solidification executing unit (62) is converted into a structure which is favorable for being smoothly inserted into the sludge downwards and has thick lower tip and upper tip; Virtually dividing a target coastal biochar modified curing area into a plurality of rows of linear strip-shaped silt areas (71) which are mutually adjacent and parallel, wherein the width of each linear strip-shaped silt area (71) is equal to the interval between a first vertical fluctuation plate (12 a) and a second vertical fluctuation plate (12 b) in an initial state; The mechanical arm (1) drives the in-situ curing execution unit (62) with a thick upper tip to translate to a position right above one end of any linear silt area (71), and the transverse through direction of the dynamic mixing tank (4) is parallel to the extending direction of the linear silt area (71); Step three, the mechanical arm (1) drives the lower-tip thick in-situ solidification executing unit (62) to be downwards and smoothly inserted into the sludge to be solidified and modified at one end of the corresponding linear strip-shaped sludge area (71), and after the in-situ solidification executing unit (62) is completely inserted into the sludge in the process of downwards sinking the sludge, the first group of hydraulic retractors (7 a) and the second group of hydraulic retractors (7 b) are synchronously controlled, so that the first lifting hinging seat (9 a) and the second lifting hinging seat (9 b) synchronously upwards move to the initial positions; the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) are restored to an initial vertical state, so that the first vertical fluctuation plate (12 a) and the second vertical fluctuation plate (12 b) are respectively overlapped with two edges of the linear strip-shaped silt region (71) in a top view, and meanwhile, the first bottom fluctuation plate (16 a) and the second bottom fluctuation plate (16 b) are restored to an initial horizontal state, and at the moment, the silt contained in the dynamic mixing tank (4) is surrounded into a cube shape by the first upper inclined fluctuation plate (10 a), the second upper inclined fluctuation plate (10 b), the first vertical fluctuation plate (12 a), the second vertical fluctuation plate (12 b), the first bottom fluctuation plate (16 a) and the second bottom fluctuation plate (16 b).
8. The working method of the coastal cemented soil in-situ modification and solidification system according to claim 7, which is characterized in that: Simultaneously, two sets of transmission structures in the stirring head driving seat (2) drive the first stirring head (20 a) and the second stirring head (20 b) to rotate around respective axes, so that sludge contained in the dynamic stirring tank (4) is fully stirred and mixed with the biochar modified cement slurry under the combined stirring of the first stirring head (20 a) and the second stirring head (20 b); Simultaneously, the first group of hydraulic retractors (7 a) and the second group of hydraulic retractors (7 b) are controlled in a periodical and small-amplitude manner, so that the first lifting hinging seat (9 a) and the second lifting hinging seat (9 b) are subjected to periodical and up-and-down displacement in a small-amplitude manner, and further the first upper inclined fluctuation plate (10 a), the second upper inclined fluctuation plate (10 b), the first vertical fluctuation plate (12 a), the second vertical fluctuation plate (12 b), the first bottom fluctuation plate (16 a) and the second bottom fluctuation plate (16 b) are subjected to periodical and back-and-forth amplitude manner under the driving of a transmission chain, so that sludge at the edge position of a dynamic mixing tank (4) far away from a stirring center is continuously subjected to periodical fluctuation, and the flow of a sludge mixture in the dynamic mixing tank (4) is promoted to be adhered to the fluctuation plate area; Meanwhile, the mechanical arm (1) drives the in-situ solidification executing unit (62) to slowly push and displace along the extending direction of the linear mud area (71) so that one end of the dynamic mixing tank (4) which is transversely penetrated continuously swallows fresh mud, and the other end of the dynamic mixing tank continuously slowly spits the fully mixed modified mud.

Description

In-situ modification and solidification system and process for coastal cement soil Technical Field The invention belongs to the field of sludge reinforcement and modification. Background Conventional coastal sludge solidification often employs an in-situ agitation solidification technique in which a solidifying agent is mixed with the sludge by mechanical agitation. The existing stirring equipment is mainly operated in an intermittent mode in construction mode, namely, after stirring is completed at a fixed position, the stirring equipment is moved to the next position, the working procedure is incoherent, the efficiency is low, a weak zone is easy to generate in a lap joint area between stirring piles, for large-scale treatment, the mixing amount of a curing agent in each local area is difficult to accurately control, the integral curing effect is easy to be uneven, the risk of local overstrength or overweakness exists, and the integral stability of engineering is influenced. Disclosure of Invention The invention aims to overcome the defects in the prior art, and provides a coastal cement soil in-situ modification and solidification system and process, which solve the problem of difficult overall homogenization control in the in-situ solidification of large-scale coastal sludge. The coastal cement soil in-situ modification and solidification system comprises an in-situ solidification execution unit at the lower end of a mechanical arm, wherein the in-situ solidification execution unit comprises a stirring head driving seat fixedly arranged at the lower end of the mechanical arm, a first stirring rotary stirring head and a second stirring rotary stirring head are symmetrically arranged on two sides of the stirring head driving seat, a curing agent grouting head is arranged on the stirring head driving seat, and a first vertical fluctuation plate and a second vertical fluctuation plate which can do swinging motion are respectively arranged on two sides of a combined structure formed by the first stirring rotary stirring head and the second stirring rotary stirring head. Further, the geometric centers of the first vertical fluctuation plate and the second vertical fluctuation plate are respectively provided with a transverse hollow groove in a hollowed mode, the middle heights of the first vertical fluctuation plate and the second vertical fluctuation plate are respectively and integrally provided with a transverse first pendulum shaft and a transverse second pendulum shaft, one sides of the stirring head driving seat, which are close to the first vertical fluctuation plate and the second vertical fluctuation plate, are respectively and integrally provided with a first support arm and a second support arm, the tail ends of the first support arm and the second support arm are respectively provided with a pendulum shaft penetrating hole of a transverse tube body, the first pendulum shaft coaxially rotates to penetrate through the pendulum shaft penetrating hole on the first support arm, and the second pendulum shaft coaxially rotates to penetrate through the pendulum shaft penetrating hole on the second support arm, so that under the support of the first support arm and the second support arm, the first vertical fluctuation plate and the second vertical fluctuation plate swing around the axis of the first pendulum shaft and the second pendulum shaft respectively. Further, the first screw conveyer blade and the second screw conveyer blade are respectively and integrally arranged on the periphery of the first screw conveyer rotary stirring head and the periphery of the second screw conveyer rotary stirring head, and stirring piles are arranged on the first screw conveyer blade and the second screw conveyer blade along the extending direction of the blades. The first stirring rotary stirring head and the second stirring rotary stirring head are obliquely downward, the axis of the first stirring rotary stirring head and the axis of the second stirring rotary stirring head form an obtuse angle, the stirring device further comprises a first bottom fluctuation plate and a second bottom fluctuation plate which are bilaterally symmetrical, one ends of the first bottom fluctuation plate and the second bottom fluctuation plate, which are close to each other, are hinged through a central hinge, and one ends of the first bottom fluctuation plate and the second bottom fluctuation plate, which are far away from each other, are respectively hinged to the lower ends of the first vertical fluctuation plate and the second vertical fluctuation plate through a left lower hinge and a right lower hinge. The central hinge is lower than the left lower hinge and the right lower hinge in an initial state, the lifting hinge further comprises a first upper oblique wave moving plate and a second upper oblique wave moving plate which are bilaterally symmetrical, the first upper oblique wave moving plate and the second upper oblique wave movi