CN113199605A

CN113199605A - Adjustable prefabricated caisson core mold without vertical splayed shape and prefabricating method

Info

Publication number: CN113199605A
Application number: CN202110516278.4A
Authority: CN
Inventors: 赵劲松; 董杰; 赵利强; 何冰耀; 刘子旭; 孙鑫宇; 王贺
Original assignee: Yanshan University
Current assignee: Yanshan University
Priority date: 2021-05-12
Filing date: 2021-05-12
Publication date: 2021-08-03
Anticipated expiration: 2041-05-12
Also published as: CN113199605B

Abstract

The invention discloses an adjustable prefabricated caisson core mould without a vertical splayed shape and a prefabricating method, which belong to the technical field of templates, and comprise 4 combined steel templates arranged around the core mould, a bottom plate arranged at the bottom end of the core mould, a derrick arranged at the upper end of the bottom plate, a hydraulic system, an acquisition system and a control system, wherein the core mould also comprises a baffle plate arranged between the adjacent combined steel templates; the combined steel template is of a steel frame structure without a vertical splayed shape; the well-shaped frame is provided with a plurality of hydraulic cylinders I connected with a steel frame structure on the combined steel template, and piston rods of the hydraulic cylinders I stretch out and draw back to drive the combined steel template to move so as to adjust the positions of the core mold and the outer template; the hydraulic power unit in the hydraulic system is placed to the upper end of bottom plate, and hydraulic wall bolt has been inlayed to the both sides at middle part, and adjustment mechanism has been inlayed to the other both sides of bottom. Compared with the traditional manual installation mode, the installation time is greatly shortened, the installation precision is improved, and the safety of operators is guaranteed.

Description

Adjustable prefabricated caisson core mold without vertical splayed shape and prefabricating method

Technical Field

The invention relates to the technical field of machinery and hydraulic pressure, in particular to an adjustable prefabricated caisson core mold without a vertical splayed shape and a prefabricating method.

Background

In various engineering constructions, a gravity caisson is a common device in wharf engineering construction, and a caisson core mold is needed in a pouring process of the caisson. In the prior art, the template of the bin lattice in the caisson is usually a bulk template, a support system is arranged in the bin lattice, and concrete is poured after the erection and forming of the template is finished, so that the construction method has the following defects: the mold supporting process is complicated; after concrete is poured, the templates need to be separated manually, and then all the templates are taken out, so that the working progress of removing the templates is slow, and the safety of workers cannot be well guaranteed; as for the positioning of the core mold bottom plate, manual correction is generally adopted, the process is complicated, and the positioning precision is difficult to ensure.

However, although the existing automatic contraction type internal template in China can realize automation, like the patent with the application number of 2017207827298, the template adopts a vertical splayed shape, so that the structure is complex, the processing difficulty is high, and the disassembly and the assembly are inconvenient; when the template moves, although the template has two degrees of freedom, the control difficulty is high, and the movement precision is low; in the hoisting process, people need to observe the position of the core mold, the position is corrected in real time, and the positioning precision is low.

Therefore, an automatic shrinkage type inner template structure with simple structure, high efficiency and high precision needs to be developed.

Disclosure of Invention

The invention provides an adjustable prefabricated caisson core mould without a vertical splayed shape and a prefabricating method, and the adjustable prefabricated caisson core mould without the vertical splayed shape is used for an automatic shrinkage type internal mould plate structure for caisson prefabricating.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a kind of adjustable precast caisson mandrel without vertical splayed shape, including 4 pieces of combination steel templates set up around the mandrel, the bottom plate set up in the bottom of mandrel, the # -shaped frame, hydraulic system, acquisition system and control system set up in the upper end of bottom plate, the said mandrel also includes the baffle set up between adjacent combination steel templates; the combined steel template is of a steel frame structure without a vertical splayed shape; the well-shaped frame is provided with a plurality of hydraulic cylinders I connected with a steel frame structure on the combined steel template, and piston rods of the hydraulic cylinders I stretch out and draw back to drive the combined steel template to move so as to adjust the positions of the core mold and the outer template; the two sides of the upper part of the bottom plate are embedded with hydraulic wall bolts for fixing the core mold, and the other two sides of the lower part of the bottom plate are embedded with adjusting mechanisms for adjusting the pose of the core mold.

The technical scheme of the invention is further improved as follows: the bottom plate is square structure, including upper plate and lower plate, 2 hydraulic pressure wall bolts by two driven of 1 pneumatic cylinder have respectively been inlayed to the left and right sides of upper plate.

The technical scheme of the invention is further improved as follows: the front side and the rear side of the lower bottom plate are respectively provided with 1 adjusting mechanism; the adjusting mechanism comprises a hydraulic cylinder III, a connecting rod I fixedly installed on a piston rod of the hydraulic cylinder III, a connecting rod II vertically and fixedly connected with the connecting rod I, supporting rods vertically arranged at two ends of the connecting rod II and universal balls installed in the supporting rods.

The technical scheme of the invention is further improved as follows: the acquisition system comprises displacement sensors respectively arranged on piston rods of the first hydraulic cylinder, the second hydraulic cylinder and the third hydraulic cylinder, pressure sensors respectively arranged on the oil inlet pipe and the oil return pipe, and a laser ranging device arranged at the bottom end of the lower bottom plate.

The technical scheme of the invention is further improved as follows: the four corners of the upper part of the well-shaped frame are respectively provided with 2, and the four corners of the lower part of the well-shaped frame are respectively provided with 2 hydraulic cylinders I.

The technical scheme of the invention is further improved as follows: and a guide device capable of ensuring that the piston rod of the first hydraulic cylinder moves along a straight line is arranged beside each first hydraulic cylinder.

The technical scheme of the invention is further improved as follows: and two ends of the combined steel template are provided with grooves for inserting the baffle plates.

A prefabricating method of an adjustable prefabricated caisson core mold without a vertical splayed shape comprises the following steps:

step 1, horizontally hoisting a core mold into a bin lattice by adopting a crane, extending an adjusting mechanism arranged on a bottom plate under the driving of a hydraulic cylinder III to provide force and couple, dynamically adjusting the posture of the core mold, rolling a universal ball along the inner wall of the bin lattice to play a role of slave posture adjustment, monitoring the position of the core mold in real time by a laser ranging device facing the ground along with the horizontal descending of the core mold, and driving a hydraulic wall bolt to automatically pop out and extend into a reserved wall bolt hole of the bin lattice when the distance between the bottom surface of the core mold and a reference surface reaches a set value;

step 2, when the combined steel formwork starts to work, a piston rod of the first hydraulic cylinder moves and pushes the combined steel formwork to slide outwards, when a displacement sensor arranged on the piston rod of the first hydraulic cylinder detects that the combined steel formwork moves to a target position, the combined steel formwork is locked by a hydraulic locking device, then a wedge is used for tightening the combined steel formwork, 4 baffles are manually placed, and then concrete pouring is started;

and 3, after concrete pouring is finished and the concrete strength meets the formwork removal requirement, unlocking the guide device, loosening the wedge to enable the core mold and the concrete to be separated, then simultaneously moving the 16 hydraulic cylinders to pull the combined steel formwork back to the designated position to finish the recovery of the core mold, finally moving the 2 hydraulic cylinders to recover the hydraulic wall plug, and lifting and moving the core mold by using a crane.

The technical scheme of the invention is further improved as follows: if the core mold touches an obstacle in the moving process, the pressure sensor detects that the pressure of the oil return cavity of the hydraulic cylinder rises, and the displacement sensor detects that the core mold does not move to the target position, the overflow valve automatically unloads, and the protection when meeting a block is realized.

Due to the adoption of the technical scheme, the invention has the technical progress that:

1. the invention is designed for satisfying the positioning and vertical reciprocating motion of the core mould without vertical splayed characters, can replace a manual tensioner to realize the function of the core mould returning, and can adapt to the working conditions of different resistances at the top and the bottom when the template slides; the mode that a hydraulic system is combined with a guide device is adopted, so that the template without the vertical splayed shape can vertically move back and forth according to the specified motion synchronization and the positioning precision.

2. According to the invention, the adjusting mechanisms are arranged on the two sides of the lower bottom plate, and the universal balls are assembled at the tail ends of the adjusting mechanisms, so that the bottom plate can rotate in a small range and is used for adjusting the position of the core mold, thereby replacing the situation of manually twisting and adjusting the position of the bottom plate.

3. According to the invention, the hydraulic wall bolts are embedded at the other two sides of the upper base plate and used for fixing the core mold, so that the core mold can be automatically fixed.

4. The laser distance measuring device is arranged at the bottom end of the bottom plate, so that the core mold has an aerial positioning function, the position of the core mold is judged by monitoring the distance between the bottom plate and the bottom surface of the bin grid in the horizontal hoisting process, and the bottom plate wall bolt is automatically popped up and extends into the reserved wall bolt hole when the distance between the bottom plate and the bottom surface of the bin grid reaches a set value.

5. The invention adopts four combined steel frame templates without vertical splayed shape to assemble an integral structure, and has convenient hoisting, simple template structure, convenient processing and simple folding and unfolding process.

6. The invention adopts hydraulic drive, and the hydraulic cylinder has large output; the reciprocating motion of the core mold is completed by controlling a mechanical device under the electric control, so that the electromechanical-hydraulic integration of the template operation is realized.

7. The invention adopts an electrical system controlled by the PLC, and the PLC is used for proportional valve control, so that the position of the hydraulic cylinder can be accurately controlled, the parallelism of the template and the adjusting mechanism can be ensured, and the PLC has the advantages of strong universality and convenient maintenance.

8. The invention adopts the combination of the displacement sensor and the pressure sensor, can detect the position of the template in real time, and automatically stops when the template touches an obstacle, thereby effectively protecting the core mold.

9. The invention adopts multilayer safety protection strategies such as mechanical system safety design, drive system safety protection, control system hardware protection, software protection and the like, can realize the safety protection of the hydraulic template system and ensure the safe and reliable work of the template.

Drawings

FIG. 1 is a schematic plan view of the present invention;

FIG. 2 is a schematic view of the internal structure of the present invention;

FIG. 3 is a plan view of the base plate of the present invention;

FIG. 4 is a front view of the base plate of the present invention;

FIG. 5 is a schematic view of the adjustment mechanism of the present invention;

FIG. 6 is a schematic diagram of the hydraulic system of the present invention;

FIG. 7 is a schematic view of the construction of the guide of the present invention;

the hydraulic control system comprises a baffle 1, a baffle 2, a hydraulic cylinder I, a hydraulic cylinder 3, a derrick 4, a combined steel template 5, a steel frame structure 6, a ladder stand, 7, an inclined support 8, a base plate 9, a universal ball 10, an adjusting mechanism 11, a hydraulic wall bolt 12, a laser distance measuring device 13, an upper base plate 14, a lower base plate 15, a connecting rod I, a connecting rod II, a connecting rod 17, an energy accumulator 18, a check valve 19, an overflow valve 20, an air cooler 21, a filter 22, an oil tank 23, a motor 24, a liquid level thermometer 25, a coupler 26, a normally open stop valve 27, a hydraulic pump 28, a pressure gauge 29, a normally closed stop valve 30, a three-position four-way servo valve 31, a displacement sensor 32, a pressure sensor 33, a fixed tank 34, a telescopic rod 35, a pressure bearing plate 36, a guide device 37 and a hydraulic locking device.

Detailed Description

The invention is described in further detail below with reference to the following figures and examples:

it should be noted that in the description of the present patent application, the terms "middle", "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present patent and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present patent.

As shown in fig. 1-7, an adjustable prefabricated caisson core mold without a vertical splayed shape comprises 4 combined steel templates 4 arranged around the core mold, a bottom plate 8 arranged at the bottom end of the core mold, a vertical frame 3 arranged at the upper end of the bottom plate 8, a hydraulic system, a collection system and a control system; the core mold further comprises a baffle plate 1 arranged between the adjacent combined steel molding plates 4; the combined steel template 4 is of a steel frame structure without a vertical splayed shape; the well-shaped frame 3 is provided with a plurality of hydraulic cylinders I2 connected with a steel frame structure 5 on the combined steel template 4, and piston rods of the hydraulic cylinders I2 stretch to drive the combined steel template 4 to move so as to adjust the positions of the core mold and the outer template; a hydraulic pump station in a hydraulic system is placed at the upper end of the bottom plate 8, hydraulic wall bolts 11 for fixing the core mold are embedded on two sides of the middle part, and adjusting mechanisms 10 for adjusting the position and the posture of the core mold are embedded on the other two sides of the bottom part. The hydraulic pump station is a part of the device in the hydraulic system.

As shown in fig. 1 and 2, the steel frame structure without vertical splayed shape is characterized in that the connection mode between the steel frame structures is the steel frame structure without vertical splayed shape, and the structure is simple and convenient to connect.

As shown in fig. 3 and 4, the bottom plate 8 is a square structure, and comprises an upper bottom plate 13 and a lower bottom plate 14, wherein 2 hydraulic wall bolts 11 driven by 1 hydraulic cylinder II are respectively embedded at the left side and the right side of the upper bottom plate 13; specifically, 1 hydraulic cylinder II drives 2 hydraulic wall bolts 11 on one side, and the other 1 hydraulic cylinder II drives 2 hydraulic wall bolts 11 on the other side.

The front side and the rear side of the lower bottom plate 14 are respectively provided with 1 adjusting mechanism 10; the adjusting mechanism 10 comprises a third hydraulic cylinder, a first connecting rod 15 fixedly installed on a piston rod of the third hydraulic cylinder, a second connecting rod 16 vertically and fixedly connected with the first connecting rod 15, supporting rods vertically arranged at two ends of the second connecting rod 16 and universal balls 9 installed in the supporting rods.

Specifically, the method comprises the following steps: the adjusting mechanisms 10 are used for dynamically adjusting the pose of the core mold in the hoisting process, 1 group of adjusting mechanisms 10 are respectively arranged on two sides of a lower bottom plate 14 of the bottom plate 8, two groups of adjusting mechanisms 10 are arranged on the bottom plate 8, each group of adjusting mechanisms comprises a first connecting rod 15 and a third hydraulic cylinder, the first connecting rod 15 is fixedly connected with the third hydraulic cylinder and is powered by the third hydraulic cylinder, and the first connecting rod 15 is fixedly connected with the second connecting rod 16 through two screws; the universal ball 9 assembly is welded by a support rod and a universal ball element, is symmetrically distributed on the second connecting rod 16, and is fixedly connected with the second connecting rod 16 by double screws.

The acquisition system comprises displacement sensors respectively arranged on piston rods of the first hydraulic cylinder 2, the second hydraulic cylinder and the third hydraulic cylinder, pressure sensors respectively arranged on the oil inlet pipe and the oil return pipe, and a laser ranging device 12 arranged at the bottom end of the lower bottom plate 14.

The specification and model of the hydraulic cylinder I2, the hydraulic cylinder II and the hydraulic cylinder III can be unified models, and in order to save cost, different models can be selected according to use requirements.

As shown in fig. 1 and 2, 16 hydraulic cylinders one 2 are arranged on the derrick 3, wherein 2 hydraulic cylinders are arranged at four corners of the upper part of the derrick 3 respectively, and 2 hydraulic cylinders are arranged at four corners of the lower part of the derrick 3 respectively. The piston rod of the hydraulic cylinder I2 is fixedly connected with the steel frame structure 5 on the combined steel template 4, the piston rod stretches and retracts to drive the combined steel template 4 to move, and each combined steel template 4 is driven by 4 hydraulic cylinders I2. The vertical frame 3 is fixedly arranged in the middle of the upper end of the bottom plate 8, the inclined supports 7 and the transverse supports which play a reinforcing role are arranged between the vertical frames 3, and the vertical frame 3 is further welded with the crawling ladder 6 which is convenient for workers to maintain and check. And the mounting positions of the first hydraulic cylinders 2 are perpendicular to the combined steel templates 4 which are correspondingly connected.

As shown in fig. 6, the hydraulic system comprises an accumulator 17, a one-way valve 18, an overflow valve 19, an air cooler 20, a filter 21, an oil tank 22, a motor 23, a liquid level thermometer 24, a coupling 25, a normally open stop valve 26, a hydraulic pump 27, a pressure gauge 28, a normally closed stop valve 29 and a three-position four-way servo reversing valve 30; the energy accumulator 17 is arranged between the one-way valve 18 and the three-position four-way servo reversing valve 30; the hydraulic pump 27 sucks oil through a normally open stop valve 26, the hydraulic pump 27 is connected with the motor 23 through a coupler 25, and high-pressure oil output by the hydraulic pump 27 flows through a one-way valve 18 to be connected with a three-position four-way servo reversing valve 30 and a hydraulic cylinder, wherein the part is a main oil path of the system; the pressure gauge 28 is arranged on a main oil path of the system; the overflow valve 19, the air cooler 20 and the filter 21 are respectively connected in parallel at the outlet of the hydraulic pump 27; the oil tank 22 is connected with the system through an oil inlet pipe and an oil outlet pipe, and the liquid level thermometer 24 and the normally closed stop valve 29 are installed on the oil tank 22.

As shown in fig. 1, a guide device 36 capable of ensuring the linear movement of the piston rod of the hydraulic cylinder one 2 is arranged beside each hydraulic cylinder one 2; as shown in fig. 7, the guiding device 36 includes a fixed box 33, an expansion link 34 and a bearing plate 35 which are sequentially arranged from left to right, 1 hydraulic cylinder is respectively installed beside each hydraulic cylinder one, the left end fixed box 33 is fixedly connected with the well frame 3, the middle expansion link 34 is fixedly connected with the right end bearing plate 35 and can move relative to the left end fixed box 33, the right end bearing plate 35 is fixedly connected with the steel frame structure 5 of the combined steel template 4, and the expansion link 34 moves along with the hydraulic cylinder one 2, thereby playing a guiding role; when the combined steel moulding plate 4 reaches the designated position, the telescopic rod 34 is locked by the mechanical structure in the left end fixed box 33, and the locking effect is achieved at the moment. The guide 36 moves like the hydraulic cylinder 2, and the fixing box 33 has a pin hole, so that when the core mold reaches a designated position, the pin needs to be manually inserted to be fixed, and the process is performed together with the wedge.

FIG. 6 is a hydraulic system of each combined steel form 4, which comprises 4 hydraulic cylinders one 2; and each hydraulic cylinder I2 is provided with 1 set of hydraulic locking device 37, the hydraulic locking device 37 consists of two one-way valves 18, after the hydraulic system is unloaded, the core mold is tightly jacked by the hydraulic locking device 37, and the accumulator 17 in the hydraulic system is used for maintaining pressure. And the hydraulic system diagrams of the second hydraulic cylinder and the third hydraulic cylinder are the same, and each second hydraulic cylinder and each third hydraulic cylinder are provided with a hydraulic locking device 37.

As shown in fig. 1, grooves into which the blocking plates 1 are inserted are provided at both ends of the combined steel molding plate 4. When the combined steel templates 4 move to the designated position, the baffle plate 1 is placed between two adjacent combined steel templates 4, so that concrete is prevented from permeating into the core mold during pouring.

The control system comprises a PLC, a control element in a hydraulic system and the like; the control valve in the hydraulic system is controlled by the PLC to provide power for the hydraulic system, so that the motion states of the combined steel template 4, the adjusting mechanism 10 and the hydraulic wall bolt 11 are controlled, a pressure sensor 32 in an acquisition system acquires pressure values in the hydraulic system, displacement sensors 31 are arranged on all hydraulic cylinders serving as an executing mechanism to acquire displacement values of all the hydraulic cylinders, the laser ranging device 12 monitors the height of the core mold in real time, and acquisition signals of the acquisition system are input into the PLC as input signals to control the motion state of the whole mechanical system.

step 1, horizontally hoisting a core mold into a bin lattice by adopting a crane, extending an adjusting mechanism 10 arranged on a bottom plate 8 under the driving of a hydraulic cylinder III to provide force and couple, dynamically adjusting the posture of the core mold, rolling a universal ball 9 along the inner wall of the bin lattice to play a role of slave posture adjustment, monitoring the position of the core mold in real time by a laser ranging device 12 facing the ground along with the horizontal descending of the core mold, and driving a hydraulic wall bolt 11 to automatically pop out and extend into a reserved wall bolt hole of the bin lattice when the distance between the bottom surface of the core mold and a reference surface reaches a set value;

step 2, when the combined steel formwork 4 starts to work, a piston rod of the hydraulic cylinder I2 moves and pushes the combined steel formwork 4 to slide outwards, when a displacement sensor arranged on the piston rod of the hydraulic cylinder I2 detects that the combined steel formwork 4 moves to a target position, the combined steel formwork is locked by a hydraulic locking device 37, then a wedge is used for backing up, 4 baffles 1 are manually placed, and then concrete pouring is started;

and 3, after concrete pouring is finished and the concrete strength meets the formwork removal requirement, unlocking the guide device, firstly loosening the wedge to enable the core mould and the concrete to be separated, then simultaneously acting the 16 hydraulic cylinders I and II to pull the combined steel formwork 4 back to the designated position to finish the recovery of the core mould, finally acting the 2 hydraulic cylinders II to withdraw the hydraulic wall plug 11, and lifting the core mould by using a crane and moving out.

If the core mold touches an obstacle in the moving process, the pressure sensor 32 detects that the pressure of the oil return cavity of each hydraulic cylinder rises, and the displacement sensor 31 detects that the core mold does not move to the target position, the overflow valve 19 is automatically unloaded, and the resistance meeting protection is realized.

In conclusion, the automatic contraction type inner template is simple in structure, high in movement synchronization and positioning accuracy, convenient to disassemble and assemble, high in working efficiency and capable of guaranteeing the safety of operators.

The above-described embodiments are merely illustrative of the preferred embodiments of the present invention, and not restrictive, and various changes and modifications to the technical solutions of the present invention may be made by those skilled in the art without departing from the spirit of the present invention, and the technical solutions of the present invention are intended to fall within the scope of the present invention defined by the appended claims.

Claims

1. The utility model provides a prefabricated caisson mandrel of adjustable type of no perpendicular eight characters, includes that the setting is at 4 piece combination steel form (4) around the mandrel, sets up at bottom plate (8) of mandrel bottom, sets up well style of calligraphy frame (3) in bottom plate (8) upper end, hydraulic system, collection system and control system, its characterized in that: the core mould also comprises a baffle (1) arranged between the adjacent combined steel templates (4); the combined steel template (4) is of a steel frame structure without a vertical splayed shape; the well-shaped frame (3) is provided with a plurality of hydraulic cylinders I (2) connected with a steel frame structure (5) on the combined steel template (4), and piston rods of the hydraulic cylinders I (2) stretch to drive the combined steel template (4) to move so as to adjust the positions of the core mold and the outer template; two sides of the upper part of the bottom plate (8) are embedded with hydraulic wall bolts (11) for fixing the core mold, and the other two sides of the lower part of the bottom plate (8) are embedded with adjusting mechanisms (10) for adjusting the posture of the core mold.

2. The erectless splayed adjustable precast caisson core mold of claim 1, wherein: the bottom plate (8) is of a square structure and comprises an upper bottom plate (13) and a lower bottom plate (14), and 2 hydraulic wall bolts (11) driven by 1 hydraulic cylinder II are respectively embedded at the left side and the right side of the upper bottom plate (13).

3. The erectless splayed adjustable precast caisson core mold of claim 2, wherein: the front side and the rear side of the lower bottom plate (14) are respectively provided with 1 adjusting mechanism (10); the adjusting mechanism (10) comprises a third hydraulic cylinder, a first connecting rod (15) fixedly installed on a piston rod of the third hydraulic cylinder, a second connecting rod (16) vertically and fixedly connected with the first connecting rod (15), supporting rods vertically arranged at two ends of the second connecting rod (16) and universal balls (9) installed in the supporting rods.

4. The erectless splayed adjustable precast caisson core mold of any one of claims 1 to 3, wherein: the acquisition system comprises displacement sensors (31) respectively arranged on piston rods of the hydraulic cylinders I (2), II and III, pressure sensors (32) respectively arranged on the oil inlet pipe and the oil return pipe, and a laser ranging device (12) arranged at the bottom end of the lower bottom plate (14).

5. The erectless splayed adjustable precast caisson core mold of claim 1, wherein: 16 hydraulic cylinders I (2) are arranged on the well-shaped frame (3), wherein 2 hydraulic cylinders I are arranged at four corners of the upper part of the well-shaped frame (3), and 2 hydraulic cylinders I are arranged at four corners of the lower part of the well-shaped frame (3).

6. The erectless splayed adjustable precast caisson core mold of claim 1, wherein: a guide device (36) capable of ensuring that a piston rod of the hydraulic cylinder (2) moves along a straight line is arranged beside each hydraulic cylinder (2).

7. The erectless splayed adjustable precast caisson core mold of claim 1, wherein: and grooves for inserting the baffle plates (1) are formed at two ends of the combined steel template (4).

8. A prefabrication method of a prefabricated caisson core mould without a vertical splayed shape, which uses the prefabricated caisson core mould without a vertical splayed shape as claimed in any one of claims 1 to 7, and is characterized in that: the method comprises the following steps:

step 1, a mandrel is horizontally hung and placed into a bin lattice by a crane, an adjusting mechanism (10) arranged on a bottom plate (8) extends out under the driving of a hydraulic cylinder III to provide force and couple to dynamically adjust the pose of the mandrel, a universal ball (9) rolls along the inner wall of the bin lattice to play a role of slave pose adjustment, the position of the mandrel is monitored in real time by a laser ranging device (12) facing the ground along with the horizontal descending of the mandrel, and when the distance between the bottom surface of the mandrel and a reference surface reaches a set value, a hydraulic cylinder II drives a hydraulic wall bolt (11) to automatically pop out and extend into a reserved wall bolt hole of the bin lattice;

step 2, when the combined steel formwork starts to work, a piston rod of the hydraulic cylinder I (2) moves and pushes the combined steel formwork (4) to slide outwards, when a displacement sensor arranged on the piston rod of the hydraulic cylinder I (2) detects that the combined steel formwork (4) moves to a target position, the combined steel formwork is locked by a hydraulic locking device (37), then a wedge is used for tightening the back, 4 baffles (1) are manually placed, and then concrete is poured;

and 3, after concrete pouring is finished, when the concrete strength meets the formwork removal requirement, unlocking the guide device, firstly loosening the wedge to enable the core mould and the concrete to be separated, then simultaneously acting the 16 hydraulic cylinders I (2) to pull the combined steel formwork (4) back to a specified position to finish the recovery of the core mould, finally acting the 2 hydraulic cylinders II to recover the hydraulic wall plug (11), and hoisting the core mould by using a crane and moving out.

9. The prefabrication method of the erectless splayed adjustable precast caisson core mold according to claim 8, wherein: if the core mold touches an obstacle in the moving process, the pressure sensor (32) detects that the pressure of the hydraulic cylinders I (2), II and III oil return cavities of the hydraulic cylinders rises, and the displacement sensor (31) detects that the core mold does not move to the target position, the overflow valve (19) automatically unloads, and the blocking protection is realized.