CN220207165U - Slurry sampling device for deep foundation pit underground diaphragm wall construction by semi-cover excavation method - Google Patents

Abstract

The utility model belongs to the technical field of foundation pit construction, and discloses a slurry sampling device for deep foundation pit underground continuous wall construction by a half-cover-excavation method. The slurry sampling device for the deep foundation pit underground diaphragm wall construction by the half-cover excavation method comprises a plurality of sampling barrels, a control assembly and a traction assembly. The sampling barrels are arranged on the reinforcement cage of the underground continuous wall at intervals along the depth direction of the groove section, each sampling barrel is detachably connected with the reinforcement cage, and each sampling barrel can be selectively opened or closed; the control assembly comprises a plurality of first power units for controlling the opening or closing of the sampling barrel; the traction component is used for dragging the plurality of sampling barrels so that each sampling barrel can be separated from the reinforcement cage. The slurry sampling device for the underground continuous wall construction of the deep foundation pit by the semi-cover excavation method can sample slurry at different depths before the concrete casting of the underground continuous wall of the deep foundation pit by the semi-cover excavation method, is convenient to operate, can ensure the safety of constructors, and improves the safety of construction.

Description

Slurry sampling device for deep foundation pit underground diaphragm wall construction by semi-cover excavation method

Technical Field

The utility model relates to the technical field of foundation pit construction, in particular to a slurry sampling device for deep foundation pit underground continuous wall construction by a half-cover-excavation method.

Background

When large-scale underground projects such as subways and underground parking lots are built in cities, a half-cover-excavation construction mode combining an open excavation method and a cover excavation method is generally adopted, namely, after the underground is excavated downwards to a certain depth from the ground, a part of cover plates are firstly made on the top of a foundation pit to meet the traffic requirement, and then the lower part is excavated, so that the influence on the surrounding environment is reduced. In the process of excavation, because the depth of the foundation pit is deeper, the underground diaphragm wall needs to be arranged in the circumferential direction of the foundation pit to bear the load of the foundation pit. The main construction process of the underground diaphragm wall is as follows: a long and narrow deep groove is dug by a groove digging machine, then a reinforcement cage is hung in the groove and concrete is poured, so that a continuous reinforced concrete wall is built underground to support the groove section.

The slurry wall protection is needed before the concrete pouring of the underground diaphragm wall, namely, the slurry is used for applying pressure to the wall of the groove to protect the shape of the dug deep groove from being changed, and concrete is poured into the groove section after the groove is formed, so that the slurry is replaced, and a concrete unit wall section is built underground. Because the depth of the trough section is very deep, formations at different depths need to match slurries of different properties, including parameters such as slurry consistency, specific gravity, density, etc. The properties of the slurry directly affect the molding quality of the underground diaphragm wall, for example, if the slurry density is too low, the soil pressure of the slot wall cannot be balanced, and the soil body of the slot wall can collapse; if the consistency of the slurry is too high, it may cause defects in the underground diaphragm wall after casting is completed. Therefore, the slurry at different depths needs to be sampled and tested before concrete pouring, so that the performance of the slurry can be adjusted in time, and the molding quality of the poured concrete unit wall section is ensured.

In the prior art, a constructor generally stands at the edge of the trough section, plugs the sampling barrel by a rope and drops the sampling barrel into the trough section, and the sampling barrel is dragged by the rope after sampling is completed so as to complete sampling. Although the sampling can be performed in the mode, the error is larger because the sampling depth is controlled by controlling the length of the rope to be paid down; in addition, for the slurry in the deep part of the groove section, the length of the needed rope is longer, so that constructors cannot exert force, and the slurry in the deep part of the groove section cannot be obtained; meanwhile, operators need to stand at the edge of the groove section during sampling in the mode, so that falling risks exist, and safety of construction staff is not facilitated.

Therefore, a slurry sampling device for deep foundation pit underground diaphragm wall construction by a half-cover excavation method is needed to solve the above problems.

Disclosure of Invention

The utility model aims to provide a slurry sampling device for deep foundation pit underground continuous wall construction by a half-cover excavation method, which can sample slurry at different depths before concrete pouring of the deep foundation pit underground continuous wall by the half-cover excavation method, is convenient to operate, can ensure the safety of constructors, and improves the construction safety.

To achieve the purpose, the utility model adopts the following technical scheme:

the utility model provides a mud sampling device of half lid digs deep basal pit underground continuous wall construction for collect the mud of the different degree of depth departments in the slot section of half lid digs deep basal pit underground continuous wall construction, include:

the sampling barrels are arranged on a reinforcement cage of the underground continuous wall at intervals along the depth direction of the groove section, each sampling barrel is detachably connected with the reinforcement cage, each sampling barrel can be selectively opened or closed, and the sampling barrel is used for collecting mud;

the control assembly comprises a plurality of first power units, and each sampling barrel is correspondingly provided with one first power unit for controlling the opening or closing of the sampling barrel;

and the traction component is used for dragging a plurality of sampling barrels so that each sampling barrel can be separated from the reinforcement cage.

Preferably, the slurry sampling device for the deep foundation pit underground diaphragm wall construction by the half cover excavation method further comprises a connecting rope, the sampling bucket is connected to the reinforcement cage through the connecting rope, and the connecting rope is made of elastic materials.

Preferably, the sampling barrel comprises a barrel body and a barrel cover, wherein the barrel cover is movably connected to the barrel body, the position of the barrel cover relative to the barrel body is adjustable, the output end of the first power unit is connected with the barrel cover, and the first power unit is used for adjusting the position of the barrel cover relative to the barrel body so that the barrel cover is opened or closed.

Preferably, the barrel cover is rotatably connected to the barrel body, the first power unit is rotatably arranged on the inner wall of the barrel body, the output end of the first power unit is connected with the barrel cover, and the first power unit can drive the barrel cover to rotate so that the barrel cover can be opened or closed.

Preferably, a sealing element is further arranged between the barrel body and the barrel cover, and the sealing element is used for sealing and filling a gap between the barrel body and the barrel cover.

Preferably, the control assembly further comprises a control panel, the control panel is arranged outside the groove section, a plurality of first power units are connected with the control panel, and the control panel can control the opening or closing of each first power unit.

Preferably, the traction assembly comprises a plurality of traction ropes, the traction ropes and the sampling barrels are arranged in one-to-one correspondence, one end of each traction rope is connected with each sampling barrel, the other end of each traction rope can be connected with a fixed structure outside the groove section, and the traction ropes can enable the sampling barrels to be separated from the reinforcement cage.

Preferably, the traction assembly further comprises a plurality of second power units, the second power units are in one-to-one correspondence with the traction ropes, the second power units are arranged outside the groove sections, one ends of the traction ropes are connected with the sampling barrel, the other ends of the traction ropes are connected with the output ends of the second power units, and the second power units can traction the traction ropes.

Preferably, the second power unit is connected with the control panel, and the control panel can control the second power unit to be turned on or turned off.

Preferably, the sampling barrel is provided with a mark for indicating the sampling depth.

The beneficial effects are that:

the utility model provides a slurry sampling device for deep foundation pit underground diaphragm wall construction by a half-cover excavation method. When sampling, an operator stands outside the groove section, and controls the corresponding first power unit to open the sampling barrel at the corresponding depth, so that mud enters the sampling barrel. And then controlling the first power unit to close the sampling barrel, and pulling the sampling barrel out of the groove section through the traction assembly to obtain a slurry sample at the corresponding depth. Because the underground diaphragm wall needs to be lowered with the steel reinforcement cage before concreting, the sampling barrels are connected to the steel reinforcement cage and lowered into the trough section through the steel reinforcement cage, so that a plurality of sampling barrels can be stably fixed in the trough section, the stability of a slurry sampling device for deep foundation pit underground diaphragm wall construction by a half-cover excavation method is guaranteed, and the slurry sampling device is convenient to operate and high in efficiency. The sampling barrels are arranged at intervals along the depth direction of the groove section, so that the sampling barrels can collect mud at different depths correspondingly. And each sampling bucket is provided with a first power unit, so that each first power unit correspondingly controls the opening or closing of one sampling bucket, thereby controlling the corresponding sampling bucket to collect mud, and the operation is convenient. In addition, in the sampling process, operators only need to stand outside the groove section and do not need to stand at the edge of the groove section, so that falling accidents are prevented, the safety of the operators is ensured, and the construction safety is improved.

Drawings

Fig. 1 is a schematic structural diagram of a slurry sampling device for deep foundation pit underground diaphragm wall construction by a semi-cover excavation method.

In the figure:

1. a sampling barrel;

2. a control assembly; 21. a first power unit; 22. a control panel; 221. a first control switch;

100. a trough section;

200. and (5) a reinforcement cage.

Detailed Description

The utility model is described in further detail below with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the utility model and are not limiting thereof. It should be further noted that, for convenience of description, only some, but not all of the structures related to the present utility model are shown in the drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "right", etc. orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Referring to fig. 1, the present embodiment provides a slurry sampling device for deep foundation pit underground continuous wall construction by half-cover-excavation, which is used for collecting slurries at different depths in a trough section 100 for deep foundation pit underground continuous wall construction by half-cover-excavation, and the slurry sampling device for deep foundation pit underground continuous wall construction by half-cover-excavation comprises a plurality of sampling barrels 1, a control assembly 2 and a traction assembly.

Wherein, a plurality of sampling barrels 1 are arranged on the reinforcement cage 200 of the underground diaphragm wall along the depth direction interval of the groove section 100, each sampling barrel 1 is detachably connected with the reinforcement cage 200, each sampling barrel 1 can be selectively opened or closed, and the sampling barrel 1 is used for collecting mud. The control assembly 2 comprises a plurality of first power units 21, and each sampling barrel 1 is correspondingly provided with one first power unit 21 for controlling the opening or closing of the sampling barrel 1. The traction assembly is used for traction of the plurality of sampling barrels 1 so that each sampling barrel 1 can be separated from the reinforcement cage 200.

When the slurry sampling device for underground diaphragm wall construction of a deep foundation pit by the semi-cover excavation method is specifically used, the plurality of sampling barrels 1 are connected to the reinforcement cage 200 of the underground diaphragm wall along the depth direction of the groove section 100 according to sampling requirements, and then the reinforcement cage 200 is lowered into the groove section 100. During sampling, an operator stands outside the tank section 100 and controls the corresponding first power unit 21 to open the sampling bucket 1 at the corresponding depth, so that slurry enters the sampling bucket 1. And then controlling the first power unit 21 to close the sampling barrel 1, and pulling the sampling barrel 1 out of the groove section 100 through the traction assembly to obtain a slurry sample at the corresponding depth. Because the underground diaphragm wall needs to be lowered with the steel reinforcement cage 200 before concrete is poured, the sampling barrels 1 are connected to the steel reinforcement cage 200 and are lowered into the tank section 100 through the steel reinforcement cage 200, so that a plurality of sampling barrels 1 can be stably fixed in the tank section 100, the stability of a slurry sampling device for deep foundation pit underground diaphragm wall construction by a half-cover excavation method is guaranteed, and meanwhile, the operation is convenient and the efficiency is high. The sampling barrels 1 are arranged at intervals along the depth direction of the groove section 100, so that the sampling barrels 1 can correspondingly collect mud at different depths. Each sampling bucket 1 is provided with a first power unit 21, so that each first power unit 21 correspondingly controls the opening or closing of one sampling bucket 1, thereby controlling the corresponding sampling bucket 1 to collect mud, and the operation is convenient. In addition, in the sampling process, operators only need to stand outside the groove section 100 and do not need to stand at the edge of the groove section 100, so that falling accidents are prevented, the safety of the operators is ensured, and the construction safety is improved.

Referring to the orientation of fig. 1, the sampling bucket 1 is open upward to facilitate collection of mud. The number and the interval of the sampling barrels 1 are set according to the actual sampling requirement. Illustratively, referring to the orientation of fig. 1, when it is desired to measure the mud properties at locations 5 meters, 10 meters, and 15 meters from the bottom wall of the tank section 100, three sampling barrels 1 are connected to the rebar cage 200 at locations 5 meters, 10 meters, and 15 meters from bottom to top, respectively, and then the rebar cage 200 is lowered into the tank section 100. Optionally, the sampling barrel 1 is provided with a mark, the mark is used for indicating the sampling depth, and the mark can clearly indicate the sampling depth, so that the subsequent detection is convenient, and the slurry sample is prevented from being mixed. Optionally, the indicia are provided on the sampling bucket 1 by means of printing.

Optionally, the slurry sampling device for the deep foundation pit underground diaphragm wall construction by the half-cover excavation method further comprises a connecting rope, the sampling bucket 1 is connected to the reinforcement cage 200 through the connecting rope, and the connecting rope is made of elastic materials. The sampling bucket 1 is fixed on the steel reinforcement cage 200 through the connecting rope, and because the connecting rope is made of elastic material, when the sampling bucket 1 is pulled by the traction component, the connecting rope can deform under the stress, and when the deformation reaches the limit of the connecting rope, the connecting rope can break, so that the sampling bucket 1 is separated from the steel reinforcement cage 200 and is pulled out of the groove section 100 through the traction component. Optionally, the connecting rope is rubber band, and the sampling bucket 1 is tied up on the steel reinforcement cage 200 through the rubber band, and the elongation of rubber band is big, the resilience is good, low price.

Optionally, the sampling barrel 1 includes a barrel body and a barrel cover, the barrel cover is movably connected to the barrel body, the position of the barrel cover relative to the barrel body is adjustable, the output end of the first power unit 21 is connected with the barrel cover, and the first power unit 21 is used for adjusting the position of the barrel cover relative to the barrel body so as to enable the barrel cover to open or close the sampling barrel 1. So set up, because the output and the bung of first power unit 21 are connected, consequently can adjust the position of bung relative staving through controlling first power unit 21 to can open or seal sampling bucket 1, and then can conveniently collect mud. Alternatively, the first power unit 21 is an electric motor.

In this embodiment, the barrel cover is rotatably connected to the barrel body, the first power unit 21 is rotatably disposed on the inner wall of the barrel body, and the output end of the first power unit is connected to the barrel cover, and the first power unit 21 can drive the barrel cover to rotate, so that the barrel cover opens or closes the sampling barrel 1. Optionally, a retaining ring is arranged at the bung hole of the barrel body, two first lug plates are oppositely arranged on the edge of the retaining ring, a connecting ring is arranged at one end of the barrel cover, and the pin shaft is arranged on the connecting ring in a penetrating mode, and two ends of the pin shaft are fixedly connected with the two first lug plates respectively, so that the rotary connection of the barrel cover and the barrel body is achieved. Further, two second lug plates are arranged on the side wall of the barrel body, a rotating shaft is arranged on the first power unit 21 along the radial direction of the barrel body, and the rotating shaft is respectively connected with the two second lug plates in a rotating way, so that the first power unit 21 is connected with the side wall of the barrel body in a rotating way. Further, two third ear plates are oppositely arranged on one surface of the barrel cover, facing the barrel body, of the hinge pin penetrates through the output end of the first power unit 21, and two ends of the hinge pin are fixedly connected with the two third ear plates respectively, so that the output end of the first power unit 21 is rotationally connected with the barrel cover. When the first power unit 21 is started, the output end of the first power unit 21 applies a force to the barrel cover, so that the barrel cover rotates around one end of the barrel cover, and the sampling barrel 1 can be opened or closed. Preferably, the first ear plate, the second ear plate and the third ear plate are all arranged on the same side to avoid that the first power unit 21 blocks the bung hole of the sampling barrel 1.

In another alternative embodiment, the barrel cover can be slidably connected to the barrel body, the output end of the first power unit 21 is connected to the barrel cover, and the first power unit 21 is used for driving the barrel cover to slide, so that the barrel cover can open or close the sampling barrel 1.

Optionally, a sealing element is further arranged between the barrel body and the barrel cover, and the sealing element is used for sealing and filling a gap between the barrel body and the barrel cover. The sealing property of the sealing piece is guaranteed when the sampling barrel 1 is closed, so that slurry is prevented from flowing out of the sampling barrel 1. Optionally, the sealing element is made of rubber material, and the rubber material has high elasticity, good sealing performance and low cost.

Optionally, the control assembly 2 further includes a control panel 22, the control panel 22 is disposed outside the tank section 100, the plurality of first power units 21 are all connected to the control panel 22, and the control panel 22 can control opening or closing of each first power unit 21. So configured, the plurality of first power units 21 can be controlled by the control panel 22. Preferably, the first power unit 21 is communicatively coupled to the control panel 22. The communication connection has strong anti-interference capability and stable connection. Optionally, the control panel 22 is provided with a plurality of first control switches 221, the plurality of first control switches 221 are in one-to-one correspondence with the plurality of first power units 21, and the first power units 21 can be controlled to be turned on or off by the first control switches 221.

In another alternative embodiment, the first power unit 21 may also be connected to the control panel 22 via a data line.

Optionally, the traction assembly includes a plurality of traction ropes, and a plurality of traction ropes and a plurality of sampling barrels 1 one-to-one set up, and the one end of traction rope links to each other with sampling barrel 1, and the other end can link to each other with the fixed knot outside the groove section 100, and traction rope can make sampling barrel 1 break away from steel reinforcement cage 200. Before sampling, the sampling barrel 1 is firstly connected to the steel reinforcement cage 200, the other end of the traction rope is connected with a fixed structure outside the groove section 100, and then the steel reinforcement cage 200 is lowered into the groove section 100. After the sampling is finished, the corresponding sampling barrel 1 is pulled out of the groove section 100 through the corresponding traction rope. The other end of the traction rope is fixed on a fixed structure outside the groove section 100, so that the traction rope can be prevented from falling into the groove section 100, and meanwhile, an operator can conveniently stand outside the groove section 100 to pull the traction rope. It should be noted that the fixing structure may be any structure outside the tank section 100, so long as the traction rope can be fixed, and the other end of the traction rope is illustratively fixed on a steel structural column outside the tank section 100.

Optionally, be provided with the go-between on the sampling bucket 1, the haulage rope passes through the go-between to be connected with sampling bucket 1 to this has realized the stable connection of haulage rope and sampling bucket 1, avoids the haulage rope to break away from sampling bucket 1 at the sampling in-process. In this embodiment, the connection ring is disposed on the outer wall of the tub.

Optionally, the traction assembly further includes a plurality of second power units, the plurality of second power units are in one-to-one correspondence with the plurality of traction ropes, the second power units are arranged outside the groove section 100, one end of each traction rope is connected to the sampling barrel 1, the other end of each traction rope is connected to an output end of each second power unit, and each second power unit can traction the traction ropes. The setting of second power unit has realized that automatic carry draws sample bucket 1, can pull out outside the trough section 100 with corresponding sample bucket 1 through the second power unit that corresponds of control, has liberated operating personnel's both hands, convenient operation, efficient. Optionally, the second power unit is an electric winch.

Preferably, the second power unit is connected to the control panel 22, and the control panel 22 can control the second power unit to be turned on or off. So configured, the control panel 22 can correspondingly control the second power unit to pull the corresponding pull rope, thereby pulling the corresponding sampling bucket 1 out of the trough section 100. Correspondingly, a plurality of second control switches are arranged on the control unit, the second control switches are arranged in one-to-one correspondence with the second power units, and the second control units can be controlled to be turned on or turned off through the second control switches. Optionally, in this embodiment, the second power unit is communicatively coupled to the control panel 22. Of course, in other embodiments, the second power unit may also be connected to the control panel 22 via a data line.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Various obvious changes, rearrangements and substitutions can be made by those skilled in the art without departing from the scope of the utility model. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. The utility model provides a mud sampling device of half lid dig method deep basal pit diaphragm wall construction for collect the mud of different degree of depth departments in slot section (100) of half lid dig method deep basal pit diaphragm wall construction, its characterized in that includes:

the sampling barrels (1) are arranged on a reinforcement cage (200) of the underground continuous wall at intervals along the depth direction of the groove section (100), each sampling barrel (1) is detachably connected with the reinforcement cage (200), each sampling barrel (1) can be selectively opened or closed, and the sampling barrels (1) are used for collecting mud;

the control assembly (2) comprises a plurality of first power units (21), and each sampling barrel (1) is correspondingly provided with one first power unit (21) for controlling the opening or closing of the sampling barrel (1);

and the traction component is used for dragging a plurality of sampling barrels (1) so that each sampling barrel (1) can be separated from the reinforcement cage (200).

2. The slurry sampling device for the construction of the underground continuous wall of the deep foundation pit by the half-cover excavation method according to claim 1, wherein the slurry sampling device for the construction of the underground continuous wall of the deep foundation pit by the half-cover excavation method further comprises a connecting rope, the sampling bucket (1) is connected to the reinforcement cage (200) through the connecting rope, and the connecting rope is made of an elastic material.

3. The slurry sampling device for deep foundation pit underground diaphragm wall construction by the semi-cover excavation method according to claim 1, wherein the sampling barrel (1) comprises a barrel body and a barrel cover, the barrel cover is movably connected to the barrel body, the position of the barrel cover relative to the barrel body is adjustable, the output end of the first power unit (21) is connected with the barrel cover, and the first power unit (21) is used for adjusting the position of the barrel cover relative to the barrel body so that the barrel cover can be opened or closed for the sampling barrel (1).

4. A slurry sampling device for underground diaphragm wall construction of a deep foundation pit by a half cover digging method according to claim 3, wherein the barrel cover is rotatably connected to the barrel body, the first power unit (21) is rotatably arranged on the inner wall of the barrel body, the output end of the first power unit is connected with the barrel cover, and the first power unit (21) can drive the barrel cover to rotate so as to enable the barrel cover to open or close the sampling barrel (1).

5. The slurry sampling device for the construction of the underground continuous wall of the deep foundation pit by the half cover excavation method according to claim 3, wherein a sealing element is further arranged between the barrel body and the barrel cover, and the sealing element is used for sealing and filling a gap between the barrel body and the barrel cover.

6. The slurry sampling device for deep foundation pit underground diaphragm wall construction by the semi-cover excavation method according to claim 1, wherein the control assembly (2) further comprises a control panel (22), the control panel (22) is arranged outside the trough section (100), a plurality of first power units (21) are connected with the control panel (22), and the control panel (22) can control the opening or closing of each first power unit (21).

7. The slurry sampling device for deep foundation pit underground diaphragm wall construction by the semi-cover excavation method according to claim 6, wherein the traction assembly comprises a plurality of traction ropes, the plurality of traction ropes are arranged in one-to-one correspondence with the plurality of sampling barrels (1), one end of each traction rope is connected with the sampling barrel (1), the other end of each traction rope can be connected with a fixed structure outside the corresponding groove section (100), and the traction ropes can enable the sampling barrels (1) to be separated from the steel reinforcement cage (200).

8. The slurry sampling device for deep foundation pit underground diaphragm wall construction by using a semi-cover excavation method according to claim 7, wherein the traction assembly further comprises a plurality of second power units, the second power units are in one-to-one correspondence with the traction ropes, the second power units are arranged outside the groove sections (100), one ends of the traction ropes are connected with the sampling barrel (1), the other ends of the traction ropes are connected with the output ends of the second power units, and the second power units can traction the traction ropes.

9. The slurry sampling device for deep foundation pit underground diaphragm wall construction by the semi-cover excavation method according to claim 8, wherein the second power unit is connected with the control panel (22), and the control panel (22) can control the second power unit to be opened or closed.

10. The slurry sampling device for the construction of the underground continuous wall of the deep foundation pit by the semi-cover excavation method according to any one of claims 1 to 9, wherein a mark is arranged on the sampling bucket (1), and the mark is used for indicating the sampling depth.