CN220080921U - Multi-head punching equipment - Google Patents

Abstract

The present utility model relates to a multi-head perforating apparatus for perforating an underground diaphragm wall to break the underground diaphragm wall, comprising: a plurality of punching units; the driving mechanism is arranged on one side of the punching units, at least one driving device is arranged in the driving mechanism, and the at least one driving device can drive the punching units to operate; and a support assembly coupled to the drive mechanism and including a first support member, a second support member, and a first displacement mechanism that causes relative movement between the first support member and the second support member. The multi-head punching equipment can weaken the structural strength of main steel bars in the continuous wall and can be effectively supported and fixed.

Description

Multi-head punching equipment

Technical Field

The utility model relates to the technical field of tunnel construction, in particular to multi-head punching equipment, and particularly relates to multi-head punching equipment with a supporting component.

Background

In the construction of underground spaces, such as subway lines, it is generally necessary to construct underground continuous walls (simply referred to as continuous walls or underground continuous walls) and various types of pile structures for supporting and waterproofing. Such structures contain a large number of steel bars, wherein the main steel bars are usually earthquake-resistant steel bars with diameters as large as 28mm or 32mm, which have excellent shearing resistance, so that the overall structure of the underground diaphragm wall is particularly firm.

However, these underground continuous walls occupy a large amount of underground space, which brings great restrictions to further development of the underground space. For example, batch planning of subway lines results in a number of subway stations that have been built being changed to a transfer station, but in the original planning, there is no reserved tunnel doors (or no reserved for cost reasons) for cutting or excavation by tunneling equipment such as shield machines, and thus it is necessary to break existing underground continuous walls in a new construction process.

The existing methods for breaking the underground diaphragm wall are two methods, namely a manual chiseling method and a shield machine direct wearing method.

When the manual chiseling method is adopted, a vertical shaft needs to be excavated beside a position to be broken of the underground diaphragm wall, and a new underground diaphragm wall is poured, wherein the new underground diaphragm wall uses a machinable or excavatable material, such as glass fiber reinforced plastic, to replace reinforcing steel bars at the position where tunneling equipment such as a shield tunneling machine needs to pass through, a surrounding well is formed between the new underground diaphragm wall and the old wall, muddy water in the well is pumped out, the foundation is reinforced, then a scaffold is erected, and tools such as an engineering water drilling machine, a rope saw, a pneumatic pick and the like are used for manually chiseling the original reinforced plastic underground diaphragm wall. This method usually takes 3 months and costs more than 1000 ten thousand RMB.

When the direct grinding method of the shield machine is adopted, firstly, the cutter head of the shield machine is required to be modified and the cutter configuration is improved (a special cutter is arranged on the cutter head of the shield machine to cut the steel bars in the underground diaphragm wall); secondly, even if the cutter is made of alloy steel, the cutter is still unavoidable to be damaged when the steel bar is cut, or the problems of steel bar winding cutter head and the like occur, so that the cutter needs to be manually replaced by a warehouse for processing the winding steel bar. However, when the shield machine is opened, the soil body needs to be reinforced and the environment is pressurized (for example, the soil body is raised to 3 atmospheres), which means that extra construction cost is faced and the construction under pressure causes huge safety risks for constructors. This method usually requires 1 month to consume more than 500 ten thousand RMB.

In general, both of these methods are time consuming, costly, and may face significant security risks. Therefore, there is a need to find a new way to accomplish the breach of underground diaphragm walls in a faster, less costly, safer manner.

Disclosure of Invention

The utility model aims to provide a multi-head punching device for punching holes on an underground continuous wall so as to break the underground continuous wall, and the device can be used for completing the breaking of the underground continuous wall by tunneling equipment in a faster, lower-cost and safer manner.

The applicant has found in research that the main difficulty in breaking down a diaphragm wall with tunneling apparatus comes from the long and strong main rebars in the diaphragm wall. If the structural strength of the main reinforcement can be weakened in advance, for example, the main reinforcement is partially broken, the efficiency of the tunneling apparatus for breaking the underground diaphragm wall can be greatly improved and the risk of damage to the apparatus can be reduced.

In addition, the multi-head punching apparatus needs to be supported and fixed to stably perform the punching operation when the main reinforcement is broken.

In order to be able to perform a stable punching operation by weakening the structural strength of the main reinforcement in the underground diaphragm wall in advance, the applicant according to a first aspect of the present utility model proposes a multi-headed punching apparatus for punching holes in the underground diaphragm wall to break the underground diaphragm wall, comprising: a plurality of punching units; the driving mechanism is arranged on one side of the punching units, at least one driving device is arranged in the driving mechanism, and the at least one driving device can drive the punching units to operate; and a support assembly coupled to the drive mechanism and including a first support member, a second support member, and a first displacement mechanism that causes relative movement between the first support member and the second support member. The plurality of perforating units can effectively weaken the structural strength of the main reinforcing steel bars in the underground diaphragm wall, and the supporting assembly can cause relative movement between the first supporting component and the second supporting component through the first shifting mechanism, so that the first supporting component and/or the second supporting component are/is propped open and finally supported on the supporting wall, and the multi-head perforating units are supported and fixed.

In addition, the multi-head punching equipment can also damage the concrete structure of the underground diaphragm wall, so that the underground diaphragm wall can be more easily broken.

In one embodiment, the support assembly further comprises a second displacement mechanism for causing relative movement between the first support member and the drive mechanism, either alone or in cooperation with the first displacement mechanism. Thereby, the support assembly is also able to realize a feed movement of the perforating unit connected to the drive mechanism.

Preferably, the first support member is disposed on one side of the driving mechanism where the plurality of punching units are disposed, and the second support member is disposed on the other side of the driving mechanism. Thereby, the first support member and the second support member can be extended in the longitudinal direction to be supported on the wall of the underground diaphragm wall and the wall of the working tank opposite thereto, respectively.

More preferably, the first support member is connected to the driving mechanism through the second displacement mechanism, and the second support member is connected to the driving mechanism through the first displacement mechanism. Thereby, the second displacement mechanism is able to cause relative movement between the first support member and the drive mechanism in cooperation with the first displacement mechanism. The arrangement mode enables the first shifting mechanism and the second shifting mechanism to be small and exquisite, and can effectively reduce the size and the weight of equipment.

Or the first supporting part is connected with the second supporting part through the first displacement mechanism, and the first supporting part or the second supporting part is connected with the driving mechanism through the second displacement mechanism. Thereby, the second displacement mechanism is able to solely cause a relative movement between the first support member and the drive mechanism. This arrangement makes the control of the feed movement of the perforating unit relatively simple and easy.

Preferably, the first support member includes a guide end surface on which a plurality of guide through holes corresponding to the plurality of punching units are arranged, the plurality of punching units moving in the plurality of guide through holes to extend or retract from the guide end surface, respectively, when the second displacement mechanism causes relative movement between the first support member and the driving mechanism. The guide through hole can play the guide effect to a plurality of units that punch, when running into the resistance in punching operation, can prevent to punch the unit slope, guarantees the accuracy of punching the position.

Preferably, a wear-resistant sleeve or a wear-resistant coating is arranged in the guide through hole. The wear-resistant sleeve or wear-resistant coating can significantly reduce wear of the perforating unit during the feed motion in the guide through hole.

In another embodiment, the support assembly further comprises a third support member and a third displacement mechanism, the third support member being connected to the first support member or the second support member by the third displacement mechanism. Thereby, the third support member can be stretched in the lateral direction to be supported on the side wall of the working groove.

Preferably, the multi-head punching apparatus further comprises a carriage for slidably supporting the driving mechanism, the first supporting member and/or the second supporting member. The bracket can play a role in guiding and stabilizing when hoisting multi-head punching equipment, prevent that multi-head punching equipment from turning to in the process of hoisting down, and can also play a protective role on multi-head punching equipment.

Preferably, the first and second displacement mechanisms include an oil cylinder and a stroke sensor for measuring an oil cylinder stroke of the oil cylinder, and the plurality of punching units can be individually driven or individually driven in groups according to measurement data of the stroke sensor.

Preferably, the punching unit is a drill bit of an engineering water drilling machine.

The multi-head punching equipment for breaking the underground diaphragm wall, provided by the utility model, not only can complete the breaking of the underground diaphragm wall in a faster, lower-cost and safer manner, but also has the following advantages:

1. the multi-head punching equipment can be supported and fixed in multiple directions;

2. the feeding movement of the punching unit can be realized through the supporting component;

3. control of the feed movement of the perforating unit can be achieved simply;

4. a compact arrangement structure can be realized, and the weight of the equipment is reduced;

5. the stress inclination of the punching unit in the punching operation can be prevented;

6. idle rotation of the punching unit can be prevented.

Drawings

For a better understanding of the above and other objects, features, advantages and functions of the present utility model, reference should be made to the preferred embodiments illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings. It will be appreciated by persons skilled in the art that the drawings are intended to schematically illustrate preferred embodiments of the utility model, and that the scope of the utility model is not limited in any way by the drawings, and that the various components are not drawn to scale.

FIG. 1 shows a schematic view of a multi-head punching apparatus of the present utility model in field construction;

fig. 2a shows a perspective view of a first embodiment of the multi-head punching device of the present utility model;

fig. 2b shows a perspective view of a second embodiment of the multi-head punching device of the present utility model;

fig. 2c shows a perspective view of a third embodiment of the multi-head punching device of the present utility model;

FIG. 3 schematically illustrates an arrangement of a plurality of punching units of the multi-head punching apparatus of the present utility model;

FIG. 4 exemplarily shows a work sub-area layout corresponding to the arrangement of FIG. 3; and

fig. 5 shows a flowchart for breaking a subterranean wall using the multi-head perforating apparatus of the present utility model.

Detailed Description

Specific embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. What has been described herein is merely a preferred embodiment according to the present utility model, and other ways of implementing the utility model will occur to those skilled in the art on the basis of the preferred embodiment, and are intended to fall within the scope of the utility model as well.

Fig. 1 shows a schematic diagram of a multi-head punching apparatus 100 of the present utility model in field construction. The multi-head punching apparatus 100 is hung down into the working slot 200 excavated close to the underground diaphragm wall 500 by means of the traveling crane 300 provided on the ground 700 to punch holes in the region of the underground diaphragm wall 500 to be traversed by the shield machine 600, i.e., the working region, so that the shield machine 600 traverses the underground diaphragm wall 500.

Although the shield machine 600 is exemplified as penetrating the underground diaphragm wall 500, the present utility model is applicable to a case where other tunneling equipment breaks the underground diaphragm wall by cutting, excavation, or the like.

In fig. 1, the underground space occupied by the underground diaphragm wall 500 has a depth exceeding the underground depth of the existing subway station 800. On the one hand, this is determined by industry regulations; on the other hand, this reflects the necessity of traversing underground diaphragm walls in an efficient and safe manner, and its significance for development of underground spaces.

Fig. 2a shows in detail a perspective view of a first embodiment of a multi-head punching apparatus 100 of the present utility model. The multi-head drilling apparatus 100 includes a plurality of drilling units 110, such as drill bits of a plurality of engineering water drills. The engineering water drilling machine usually uses a motor as power, uses a single diamond thin-wall drill bit as a drilling tool to drill holes on building materials such as concrete, stone, ceramic tiles and the like, and is provided with a liquid source. These perforating units 110 are capable of performing a perforating operation on the underground diaphragm wall 500, which perforating operation is required to be able to enter the underground diaphragm wall to a depth, preferably up to 1 meter or more, in order to weaken the structural strength of the main reinforcing bars inside the underground diaphragm wall, preferably to cut the main reinforcing bars to a length equal to or less than a specific length. In order to enable punching of the large-area underground diaphragm wall 500, the work efficiency is increased, and the number of punching units may be 10 or more, preferably 50 or more, more preferably 100 or more.

Considering that the main reinforcement bars in the underground diaphragm wall 500 are mainly vertically arranged, it is necessary to arrange the punching units 110 in one or more columns, at least one of which has two or more punching units, and when the vertical main reinforcement bars fall into the column having two or more punching units, the two or more punching units of the same column are capable of cutting off the main reinforcement bars, and the length of the cut main reinforcement bars is about the interval between adjacent punching units of the same column.

Preferably, in order for the single punching to be completed to cut the main reinforcing bar to less than a certain length, the interval between adjacent punching units in the same column may be set to be equal to or less than a predetermined interval, which may be 300mm, preferably 250mm, more preferably 200mm.

Considering that the arrangement of the main reinforcement bars within the underground diaphragm wall 500 is difficult to monitor, it is desirable that the multi-head punching apparatus 100 be able to weaken the structural strength of all the main reinforcement bars within the work area or work sub-area in one punching operation, regardless of the arrangement of the main reinforcement bars. As such, it is necessary to provide a plurality of columns of the punching units 110, and each punching unit 110 in adjacent columns is staggered in the vertical direction and overlapped in the lateral direction. The punching units 110 staggered in the vertical direction and overlapped in the lateral direction can ensure that the structure of the main reinforcing bars in the vertical direction is at least partially broken.

In particular, in order to achieve that the multi-head punching apparatus 100 can cut all the main bars in the work area or the work sub-area in one punching operation regardless of the arrangement of the main bars, the width of the portion where the plurality of punching units 110 in adjacent columns overlap in the lateral direction may be set to be equal to or greater than a predetermined width. The predetermined width is related to the diameter of the main reinforcement used in the underground diaphragm wall 500. In a typical underground diaphragm wall, the diameter of the main rebars is 28mm or 32mm, in which case the predetermined width may be selected to be 28mm or 32mm, respectively. Therefore, all the main reinforcing steel bars in the working area or the working area can be ensured to be cut off by the punching unit.

Fig. 3 shows a possible arrangement of the punching units 110, and fig. 4 shows an arrangement of the corresponding work subareas.

In fig. 3, 64 punching units 110 are arranged in fifteen columns in a diamond-shaped structure. Diameter D of each perforating unit 110 _c Width of transverse overlap W between adjacent columns of 250mm _c Greater than the diameter of the main reinforcement, the spacing L between adjacent perforation units 110 in the same column _c 200mm.

In order for the punching operation of the multi-head punching apparatus 100 to cover the entire work area, fig. 4 shows a work sub-area arrangement diagram corresponding to the arrangement of the punching units 110 in fig. 3. The multi-head punching apparatus 100 of a diamond structure performs a punching operation in the work sub-areas C1 to C9, each work sub-area being arranged in succession as shown in a substantially nine-square lattice. Thus, a working area S can be formed _c For shield machine 600C to traverse. The transverse overlapping width is larger than the diameter of the main reinforcing steel bars, so that the main reinforcing steel bars can be completely cut off no matter how the main reinforcing steel bars are arranged.

In particular, the perforation units 110 as in fig. 3 may be arranged in a substantially square structure by reasonably controlling the number of the perforation units 110, the pitch of adjacent perforation units 110 of each column, and the lateral distance of the perforation units 110 of adjacent columns. The arrangement mode of the punching units with the square structure is beneficial to reducing the overlapping area between the adjacent working subareas and improving the working efficiency.

The punching unit arrangement mode of the circular structure is particularly suitable for traversing of small or miniature shield machines, and the plurality of punching units are arranged in a circular structure with the diameter larger than or equal to the diameter of the shield machine, so that single punching traversing can be realized, and the construction efficiency is greatly improved.

The perforation units may also be arranged in other suitable ways and the work sub-area layout is designed accordingly to cut the main rebar to a specific length or less.

In addition, in order to more efficiently and accurately complete the punching operation, a plurality of multi-head punching devices can be assembled into a multi-head punching device group for use, and the multi-head punching device group can form a working area with enough area for the shield tunneling machine to pass through by less punching times, particularly one punching. In this case, the multi-head punching device group may include a first punching device and a second punching device, which may have different arrangements of punching units, i.e., the respective punching units of the two may be arranged in different shapes and/or sizes.

With continued reference to fig. 2, the multi-head punch apparatus 100 further includes a driving mechanism 120, and a plurality of punch units 110 are arranged on one side of the driving mechanism 120. A driving device, such as a driving motor, is disposed in the driving mechanism 120, and the driving device can drive the plurality of punching units 110 to operate.

Preferably, the perforating unit 110 is divided into several perforating unit groups, each perforating unit group being driven independently, i.e. each perforating unit group can be driven individually and selectively by its corresponding driving means.

Preferably, each perforating unit 110 is driven independently, i.e. each perforating unit 110 can be individually and selectively driven by its corresponding driving means.

The drive mechanism 120 may be configured as a drive housing having a sealed structure to prevent fluid external to the drive mechanism 120 from entering the interior of the drive mechanism 120.

Multi-head punch apparatus 100 may also include a support assembly that is primarily used to support and secure multi-head punch apparatus 100 in work cell 200.

In the embodiment shown in fig. 2a, the support assembly includes a first support member 130, a second support member 140, a first displacement mechanism 170, and a second displacement mechanism 180, wherein the first support member 130 is disposed on one side of the driving mechanism 120 where the plurality of perforating units 110 are disposed and is connected to the driving mechanism 120 through the second displacement mechanism 180, and the second support member 140 is disposed on the other side of the driving mechanism 120 and is connected to the driving mechanism 120 through the first displacement mechanism 170, such that the first displacement mechanism 170 can cause relative movement between the first support member 130 and the second support member 140 and extend the first support member 130 and the second support member 140 in the longitudinal direction to be supported on support walls (including the wall of the underground diaphragm wall 500 and the guard wall 400 opposite thereto in fig. 1) in order to support and fix the multi-head perforating apparatus 100, thereby facilitating smooth progress of the perforating operation.

In this embodiment, when the multi-head punching apparatus 100 is supported and fixed, the second displacement mechanism 180 moves the driving mechanism 120 relative to the first support member 130 in cooperation with the first displacement mechanism 170 so as to achieve the feeding movement of the punching unit 110, for example, the drill bit of the construction water drill. In this case, the first and second displacement mechanisms 170 and 180 require smaller structures, occupy smaller space in the lateral direction, and make the structure of the multi-head punching apparatus 100 more compact and lighter in weight.

Similarly, the first displacement mechanism 170 may also be disposed between the first support member 130 and the second support member 140, while the second displacement mechanism 180 is disposed between the first support member 130 or the second support member 140 and the drive mechanism 120, such that the first support member 130 is still capable of causing relative movement between the first support member 130 and the second support member 140, while the second displacement mechanism 180 alone causes feed movement of the drive mechanism 120. In this case, the control of the feeding movement of the punching unit becomes relatively simple, and only the second displacement mechanism 180 needs to be controlled.

In the above embodiment, the first displacement mechanism 170 may further minimize the distance between the first support member 130 and the second support member 140, so as to reduce the occupied space of the multi-head punching device, and facilitate transportation.

In the embodiment of fig. 2a, preferably, the first displacement mechanism 170 may comprise a plurality of first rams arranged between the drive mechanism 120 and the second support member 140 and a plurality of first travel sensors for measuring ram travel of the plurality of first rams, the plurality of first rams driving the second support member 140 in linear motion relative to the drive mechanism 120 and thus relative to the first support member 130; the second displacement mechanism 180 may include a plurality of second cylinders disposed between the driving mechanism 120 and the first support member 130, and a plurality of second stroke sensors for measuring cylinder strokes of the plurality of second cylinders, which may drive the driving mechanism 120 to linearly move with respect to the first support member 130 in cooperation with the plurality of first cylinders.

When the plurality of first cylinders drive the second support member 140 to linearly move with respect to the driving mechanism 120 and the first support member 130, the first support member 130 and the second support member 140 can be supported on the support wall in the longitudinal direction to support and fix the multi-head punching apparatus 100. After the support fixing is completed, if the values of the plurality of first stroke sensors are greatly different, it indicates that the multi-head punching apparatus 100 encounters an inclination or uneven support wall. At this time, it is possible to select to readjust the position of the multi-head punching apparatus 100 or to individually drive or group individually drive the plurality of punching units 110 based on the measurement data of the stroke sensor at the time of punching. In this way, the occurrence of the load imbalance of the apparatus 100 due to the idle rotation of the punching unit 110 can be prevented.

In addition, the first and second travel sensors may also provide the operator of the ground with a sense of the advance and retreat of the perforating unit 110.

The first support member 130 may also include a guide end surface 132, the guide end surface 132 being a generally planar surface for supporting on a support wall. The guide end surface 132 may be provided with a plurality of guide through holes 134 corresponding to the plurality of punching units 110, and the plurality of punching units 110 are respectively moved in the plurality of guide through holes 134 to extend or retract from the guide end surface 132 by the cooperation of the first and second displacement mechanisms 170 and 180 to the driving mechanism 120, thereby implementing the advance and retreat of the punching units 110 so that the punching units 110 can penetrate or cut the reinforcing bars inside the underground diaphragm wall 500. The guide through holes 134 can guide the plurality of punching units 110, and can prevent the punching units 110 from tilting when resistance is encountered in the punching operation. A wear sleeve or wear coating may also be disposed within the guide bore 134 to reduce wear of the punch unit 110 as it is extended or retracted therein.

The second support member 140 may be configured in a ring shape, for example, a circular ring or a rectangular ring, which has a substantially flat surface on the opposite side surface to the first support member 130 so as to be supported on the support wall.

Multi-headed punch apparatus 100 may further include a lifting member 160, and lifting member 160 may be arranged in fixed connection with drive mechanism 120.

Multi-headed punch apparatus 100 may further include a carriage for slidably supporting drive mechanism 120, first support component 130, and/or second support member 140. The bracket can play a role in guiding and stabilizing when the multi-head punching device 100 is lifted, prevent the multi-head punching device 100 from turning in the lifting process, and also play a role in protecting the multi-head punching device. The lifting member 160 described above may also or alternatively be arranged in fixed connection with the bracket.

Fig. 2b shows a perspective view of a second embodiment of the multi-head punching apparatus 100 of the present utility model, wherein the multi-head punching apparatus 100 comprises, in addition to the plurality of punching units 110, the driving mechanism 120 and the supporting assembly described above, a third supporting member 150 and a third displacement mechanism 190, wherein four third supporting members 150 are connected to the first supporting member 130 by means of the four third displacement mechanisms 190, and the third supporting member 150 is stretched in the lateral direction and finally supported on a supporting wall in the lateral direction by the third displacement mechanism 190, where the supporting wall in the lateral direction may be a slurry retaining wall formed on a side wall or a side wall of the working tank 200.

Fig. 2c shows a perspective view of a third embodiment of the multi-head punching apparatus 100 of the present utility model, unlike fig. 2b, four third support members 150 are connected to the second support member 140 by four third displacement mechanisms 190 (two third support members 150 and two third displacement mechanisms 190 are not shown), and the third support members 150 are stretched in the lateral direction and finally supported on the lateral direction support walls by the third displacement mechanisms 190, where the lateral direction support walls may be slurry retaining walls formed on the side walls or side walls of the working tank 200.

In the embodiment as shown in fig. 2b and 2c, the third support member 150 may be legs disposed at both sides of the first support member 130 or the second support member 140, and the third displacement mechanism 190 may be an oil cylinder driving the third support member 150 to extend or retract in the lateral direction, so that the multi-head punching apparatus 100 is supported to be fixed or to be released from being fixed.

Further, in the embodiment as shown in fig. 2b and 2c, the first and second support members 130 and 140 may be selectively supported on the support wall in the longitudinal direction along the longitudinal direction. After the third support member 150 is laterally supported by the third displacement mechanism 190, the distance between the first support member 130 and the second support member 140 may be maintained by the cooperation of the first displacement mechanism 170 and the second displacement mechanism 180, and only the driving mechanism 120 may be driven to advance and retract between the first support member 130 and the second support member 140.

Fig. 5 shows the main steps of breaking a subterranean continuous wall 500 using the multi-headed hole punching apparatus 100 described above, including: the method comprises the steps of grooving, hanging, supporting, punching, releasing and breaking. Other operational steps may be added over the above described steps to provide specific functionality. These steps will be described in detail below.

In the trenching step, it is necessary to excavate the working channel 200 on one side of the diaphragm wall 500, typically the opposite side of the shield machine 600, see fig. 1. The working tank 200 is usually excavated by using an existing trenching machine, and the excavation site is located directly above the working area of the underground diaphragm wall 500, that is, directly above the place where the shield machine 600 is to traverse. The trenching machine excavates vertically against the wall of the subterranean wall 500 such that the work trench 200 extends vertically up to the work area on the subterranean wall 500.

The soil morphology at the trench may vary considerably depending on the geographic location of the construction. Under the condition that the soil is firm, special treatment on the soil is not needed, and the groove wall of the working groove 200 can be ensured not to collapse during construction. In the case of insufficient soil firmness, it is necessary to perform soil reinforcement, for example with triaxial stirring piles, and/or to perform a filling step before the trenching step.

In the filling step, the working tank 200 may be filled with a fluid filler. The fluid fill may be selected from bentonite-conditioned slurry that also forms a slurry retaining wall 400 on the walls of the job slot 200, the slurry retaining wall 400 not only preventing collapse of the walls, but also acting as a support wall for the multi-headed punch apparatus 100.

The filling step and/or soil reinforcement are used for preventing the groove wall from collapsing, and the slurry retaining wall 400 capable of being supported is established, so that the method has great advantages in terms of cost and construction period compared with the construction of three new underground continuous walls capable of being traversed by a shield machine in the manual chiseling method.

In the hanging down step, the multi-head punching apparatus 100 is hung down into the working tank 200 by a hanging device up to a working area on the underground diaphragm wall 500. The lifting apparatus is capable of performing lifting and translation operations on the multi-head punching apparatus 100 described above so as to convey the multi-head punching apparatus 100 to a work area.

The lifting device may be provided with sensor components, such as displacement sensors, angle sensors, etc. These sensor assemblies are capable of sensing the horizontal and vertical positions of multi-head punch apparatus 100 in order to accurately position multi-head punch apparatus 100. Thus, in the step of lifting, the step of lifting the multi-head punching apparatus 100 may be performed using the sensor assembly on the lifting apparatus and based on the data sensed by the sensor assembly, and it may be determined whether the multi-head punching apparatus 100 reaches a predetermined work area.

The lifting apparatus may comprise a mobile crane and a stationary overhead row crane mechanism 300 shown in fig. 1. When the traveling crane 300 is used, it is necessary to perform an erection step before performing the unloading step in order to erect the traveling crane 300 on the ground around the working tank 200.

In order to support and fix the multi-head punching apparatus 100 at the work area, a supporting step is further performed: for example, in the embodiment of fig. 2a, the first displacement mechanism 170 is driven to support the first support member 130 on the underground diaphragm wall 500 and the second support member 140 on the wall of the working tank 200 or the mud guard 400 formed of mud.

In the punching step, a hole is punched on the work area to a predetermined depth using the multi-head punching apparatus 100. For example, when the perforating unit is a drill bit of the construction water drilling machine, the second shifting mechanism 180 forwards feeds the drill bit of the construction water drilling machine, individually or in cooperation with the first shifting mechanism 170, protrudes from the guide end face 132 of the first supporting member 130, so that the drill bit drills into the underground diaphragm wall 500, and further penetrates to cut or intercept the reinforcing bars in the underground diaphragm wall 500. After the drill bit is advanced to a predetermined depth, the second displacement mechanism 180 alone or in cooperation with the first displacement mechanism 170 withdraws the drill bit rearward, retracting from the guide end face 132 of the first support member 130.

After the punching step is performed, in order to release the support fixation of the multi-head punching apparatus 100, a releasing step is further performed: for example, in the embodiment of fig. 2a, the first displacement mechanism 170 is actuated to move the first support member 130 and the second support member 140 away from the subterranean wall 500 and the mud guard 400, respectively, for the purpose of releasing the multi-headed punching apparatus 100.

As described above, when the punching unit 110 of the multi-head punching apparatus 100 cannot completely cover the entire area of the work area, it is necessary to consider performing the punching operation on the work area in steps, that is, dividing the work area into a plurality of work sub-areas, and letting the multi-head punching apparatus 100 perform the punching operation on each of the plurality of work sub-areas in turn.

As previously described, the assembling step may also be performed to assemble a plurality of multi-head punch apparatuses 100 into a multi-head punch apparatus set, wherein the plurality of multi-head punch apparatuses 100 may be identical or different, for example, each having a different shape and/or size in which the punch units 110 are arranged.

In one embodiment, the following steps may be performed to effect a punching operation of multi-head punch apparatus 100 on a plurality of work sub-areas: performing a lowering step by a lifting apparatus and lowering the multi-head punching apparatus 100 to a first work subregion of the plurality of work subregions, for example, based on data sensed by the sensor assembly; performing a punching step of punching a hole on the first work subregion to a predetermined depth using the multi-head punching apparatus 100; performing a shifting step of shifting the multi-head punching apparatus 100 to a next work sub-area of the plurality of work sub-areas by the lifting apparatus and based on, for example, data sensed by the sensor assembly; performing a punching step of punching a hole on the next work subregion to a predetermined depth using the multi-head punching apparatus 100; the shifting step and the puncturing step described above are repeatedly performed until the multi-head puncturing device 100 traverses through each of the plurality of work subregions.

As described above, in order to stably perform the punching step, the supporting step and the releasing step are preferably performed before and after each punching step, respectively.

As previously described, a plurality of work sub-areas may be arranged continuously or overlapping on the underground diaphragm wall 500. In addition, the working area formed by the plurality of working areas covers the tunnel cross section left when the shield machine 600 passes through the underground diaphragm wall 500, that is, the area of the working area is equal to or larger than the tunnel cross section.

When the multi-head perforating apparatus 100 completes the perforating operation on the work area or all the work areas, a breaking step is performed to break the underground diaphragm wall 500 via the work area. In the embodiment shown in fig. 1, the breaking step includes manipulating shield machine 600 to break through the work area and traverse underground diaphragm wall 500.

In certain embodiments, for example, a lifting step and a backfilling step may also be performed prior to the shield machine 600 traversing the subterranean continuous wall 500. In the lifting step, the multi-head punching device 100 is lifted by the lifting device, so that enough space is provided for the shield machine 600 to traverse. In the backfilling step, it is necessary to backfill the earth into the working tank 200, and when the backfilling step is present, the fluid-filled material may be synchronously extracted in the backfilling step.

Since the multi-head punching apparatus 100 has completely cut the reinforcing bars in the working area of the underground diaphragm wall 500 to be equal to or less than a specific length, the shield machine 600 is not easy to damage the blades when traversing the underground diaphragm wall 500 via the working area, and the problem that the reinforcing bars are wound around the cutterhead or the screw conveyor is not blocked, so that the shield machine 600 can continuously traverse the underground diaphragm wall 500 without opening bins and changing cutters, thereby greatly reducing the safety risk in construction and reducing the construction period and the cost.

The foregoing description of various embodiments of the utility model has been presented for the purpose of illustration to one of ordinary skill in the relevant art. It is not intended that the utility model be limited to the exact embodiment disclosed or as illustrated. As above, many alternatives and variations of the present utility model will be apparent to those of ordinary skill in the art. Thus, while some alternative embodiments have been specifically described, those of ordinary skill in the art will understand or relatively easily develop other embodiments. The present utility model is intended to embrace all alternatives, modifications and variations of the present utility model described herein and other embodiments that fall within the spirit and scope of the utility model described above.

Reference numerals illustrate:

100. multi-head punching equipment

110. Punching unit

120. Driving mechanism

130. First support part

132. Guide end face

134. Guide through hole

140. Second support part

150. Third support part

160. Hoisting member

170. First shifting mechanism

180. Second shifting mechanism

190. Third shifting mechanism

200. Working groove

300. Traveling crane mechanism

400. Mud guard wall

500. Underground diaphragm wall

600. 600C shield machine

700. Ground surface

800. Subway station

C1-C9 work subregions

S _c Work area

D _c Diameter of punching unit

W _c Width of lateral overlap between adjacent columns of perforation units

L _c Spacing between adjacent perforation units in the same column.

Claims (11)

1. A multi-head perforating apparatus for perforating a subterranean continuous wall to break the subterranean continuous wall, the multi-head perforating apparatus comprising:

a plurality of punching units;

the driving mechanism is arranged on one side of the punching units, at least one driving device is arranged in the driving mechanism, and the at least one driving device can drive the punching units to operate; and

a support assembly is coupled to the drive mechanism and includes a first support member, a second support member, and a first displacement mechanism that causes relative movement between the first support member and the second support member.

2. The multi-headed punch apparatus of claim 1, wherein the support assembly further comprises a second displacement mechanism for causing relative movement between the first support member and the drive mechanism, either alone or in cooperation with the first displacement mechanism.

3. The multi-head punching apparatus according to claim 2, wherein the first supporting member is arranged on one side of the driving mechanism on which the plurality of punching units are arranged, and the second supporting member is arranged on the other side of the driving mechanism.

4. A multi-headed punching apparatus according to claim 3, characterized in that said first support member is connected to said driving mechanism by said second displacement mechanism, and said second support member is connected to said driving mechanism by said first displacement mechanism.

5. A multi-headed punching apparatus according to claim 3, characterized in that said first support member is connected to said second support member by said first displacement mechanism, and said first support member or said second support member is connected to said driving mechanism by said second displacement mechanism.

6. The multi-head punching apparatus according to claim 4 or 5, wherein the first supporting member includes a guide end face on which a plurality of guide through holes corresponding to the plurality of punching units are arranged, the plurality of punching units moving in the plurality of guide through holes to extend or retract from the guide end face, respectively, when the second displacement mechanism causes relative movement between the first supporting member and the driving mechanism.

7. The multi-headed punching apparatus of claim 6, wherein the guide through-holes have wear-resistant sleeves or wear-resistant coatings disposed therein.

8. The multi-headed punch apparatus of any one of claims 1-5, wherein the support assembly further comprises a third support member and a third displacement mechanism, the third support member being connected to the first support member or the second support member by the third displacement mechanism.

9. The multi-headed punching apparatus of claim 1, further comprising a carriage for slidably supporting the drive mechanism, the first support member, and/or the second support member.

10. The multi-head punching apparatus according to claim 2, wherein the first and second displacement mechanisms include a cylinder and a stroke sensor for measuring a cylinder stroke of the cylinder, and the plurality of punching units are individually driven or individually driven in groups according to measurement data of the stroke sensor.

11. The multi-head drilling apparatus of claim 1, wherein the drilling unit is a drill bit of an engineering hydrodrill.