A concrete-cement slurry interface detector

Abstract

The present invention discloses a concrete-cement slurry interface detector, including a detection body, a sensor, a detection device, a transmission line connecting the sensor and the detection device, and a display; the detection body is a column; a detection groove is provided on the side wall of the detection body, and the sensor is arranged in the detection groove; a transmission line hole connected to the detection groove from top to bottom is provided in the middle of the detection body, and the two ends of the transmission line are respectively connected to the sensor and the detection device through the transmission line hole. The concrete-cement slurry interface detector of the present invention has a simple structure, convenient operation, and high detection efficiency. The concrete-cement slurry interface is detected by the sensor in the detection groove, and the depth of the concrete-cement slurry interface is automatically calculated by detecting the lowering length of the transmission line through the detection device, and is displayed on the display in time, so as to quickly and accurately detect the interface between concrete and slurry.

Description

Technical Field

[0001] The invention relates to the technical field of foundation engineering, and in particular to a concrete-cement slurry interface detector. Background Art

[0002] Bored pile is a very common pile foundation in domestic construction projects. Its main features are large single pile bearing capacity, good pull-out resistance, strong ability to resist horizontal loads, and can be constructed under various soil conditions. In addition to being used in tall buildings, it can also be constructed underwater. In particular, there is no vibration, low noise, no soil squeezing, high construction efficiency, and low pollution during construction. It is more suitable for construction between built residential complexes. With the rapid development of the social construction industry in recent years, bored pile technology has been widely used and developed.

[0003] The bored pile foundation is usually poured with underwater concrete using the conduit method. When pouring concrete, the concrete is squeezed out from the lower end of the conduit by its own weight, and water and mud are gradually drained upward. The depth of the conduit buried in the concrete is generally 1-3 meters. Therefore, during the concrete pouring process, the conduit must be pulled out several times. Before pulling out the conduit, it is necessary to know exactly how deep the lower end of the conduit is buried in the concrete. During the drilling and pouring process, the more difficult problem to solve is how to accurately identify the interface between concrete and slurry, so as to determine the actual height of the concrete liquid level.

[0004] At present, the depth of the conduit buried in the concrete is usually calculated based on the diameter of the borehole and the volume of poured concrete, and combined with a hanging hammer detection. The disadvantage of this method is that the detection accuracy is affected and limited by the experience of the detector, and the detection is inaccurate and inefficient. Once the detection is not timely or inaccurate, the conduit will be pulled out of the interface between the concrete and the mud, causing the pile to break, or the tube will not be pulled out in time, causing the buried depth of the conduit to be too large, and the conduit connection will be pulled off when the tube is pulled out, causing the pile to break. At the same time, inaccurate detection of the concrete interface will lead to inaccurate grasp of the pile top position, which is often too high above the design elevation, and the amount of pile cut is too large, increasing the construction cost. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide a concrete-cement slurry interface detector, which has a simple structure, is easy to operate, can automatically and accurately detect the concrete-cement slurry interface, and has high detection efficiency and precision.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0007] A concrete-cement slurry interface detector comprises a detection body, a sensor, a detection device, a transmission line connecting the sensor and the detection device, and a display. The detection body is a column. A detection groove is provided on the side wall of the detection body, and the sensor is arranged in the detection groove. A transmission line hole is provided in the middle of the detection body and is connected to the detection groove from top to bottom. The two ends of the transmission line are respectively connected to the sensor and the detection device through the transmission line hole.

[0008] The above concrete-cement slurry interface detector has a simple structure, is easy to operate, safe and reliable. It detects the concrete-cement slurry interface through the sensor in the detection groove, measures the depth of the concrete-cement slurry interface by detecting the lowering length of the transmission line through the detection device, and displays it on the display in time, thereby quickly and accurately detecting the concrete and mud interface.

[0009] Furthermore, the lower part of the detection body is a cone, which can reduce the resistance of the detector to sinking.

[0010] Furthermore, the side wall of the detection body is provided with four symmetrically distributed detection grooves, and a sensor is arranged in each detection groove.

[0011] Furthermore, the lower end surface of the detection groove is an inclined surface which gradually slopes downward from the inside of the detection groove to the outside, which can prevent mud from being deposited in the detection groove during the sinking process of the detector, thereby improving the accuracy of the detection data.

[0012] Furthermore, a protective net is provided at the slot of the detection slot, and the protective net is detachably connected to the side wall of the detection slot. The protective net can protect the sensor in the detection slot, prevent the sensor from being hit by objects such as gravel in the mud during the sinking process of the detector, and extend the life of the sensor.

[0013] Furthermore, a transmission line fixing piece is provided at the upper end of the transmission line hole, and the transmission line fixing piece is fixedly connected to the upper end of the detection body. The transmission line fixing piece can fix the lower end of the transmission line in the transmission line hole to prevent the transmission line from loosening. The transmission line fixing piece is a rubber ring.

[0014] Furthermore, a protective cover is provided on the transmission line to prevent the transmission line from breaking due to external stress and collision.

[0015] Furthermore, the sensor is a conductivity sensor, which can detect and distinguish whether the fluid at a location is concrete by testing the conductivity of the surrounding fluid, and transmit the signal to the detection device.

[0016] Compared with the prior art, the present invention has the following significant beneficial effects:

[0017] (1) The concrete-cement slurry interface detector of the present invention has a simple structure, is easy to operate, and has high detection efficiency. The concrete-cement slurry interface is detected by a sensor in the detection tank, and the depth of the concrete-cement slurry interface is automatically calculated by detecting the lowering length of the transmission line through a detection device, and is displayed on a display in a timely manner, thereby quickly and accurately detecting the interface between concrete and slurry.

[0018] (2) The detection sensor is placed in the detection groove and a protective net is set up to prevent the sensor from being hit by objects such as gravel in the mud during the sinking process of the detector, thereby protecting the sensor and extending the service life of the detector. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the structure of the pile concrete-cement slurry interface detector of the present invention;

[0020] Markings in the figure: 1-detection body; 2-sensor; 3-detection device; 4-transmission line; 5-display; 6-detection slot; 7-transmission line hole; 8-protective net; 9-card slot; 10-transmission line fixing piece; 11-protective cover. DETAILED DESCRIPTION

[0021] The specific implementation modes of the present invention are described in detail below with reference to the accompanying drawings.

[0022] like Figure 1 As shown, a concrete-cement slurry interface detector of the present invention comprises a detection body 1, a sensor 2, a detection device 3, a transmission line 4 connecting the sensor 2 and the detection device 3, and a display 5. The upper part of the detection body 1 is a cylinder, and the lower part of the detection body 1 is a cone. The side wall of the detection body 1 is provided with four symmetrically distributed detection grooves 6, and each detection groove 6 is provided with a sensor 2. The middle part of the detection body 1 is provided with a transmission line hole 7 connected to the detection groove 6 from top to bottom. The two ends of the transmission line 4 are respectively connected to the sensor 2 and the detection device 3 through the transmission line hole 7.

[0023] The lower end surface of the detection groove 6 is an inclined surface which gradually slopes downward from the inside of the detection groove 6 to the outside, so as to prevent mud from being deposited in the detection groove 6 during the sinking process of the detector, thereby improving the accuracy of the detection data.

[0024] The notch of the detection slot 6 is provided with a protective net 8, and the upper and lower side walls of the detection slot 6 are both provided with a clamping slot 9, and the protective net 8 and the side wall of the detection slot 6 are detachably connected together through the clamping slot 9. The protective net 8 can protect the sensor 2 in the detection slot 6, prevent the sensor 2 from being hit by objects such as gravel in the mud during the sinking process of the detector, and extend the life of the sensor 2.

[0025] The upper end of the transmission line hole 7 is provided with a transmission line fixing part 10, and the transmission line fixing part 10 can fix the lower end of the transmission line 4 in the transmission line hole 7 to prevent the transmission line 4 from loosening. The transmission line fixing part 10 is a rubber ring bonded to the upper end of the detection body, and the rubber ring and the transmission line 4 are fixedly bonded together.

[0026] The transmission line 4 is provided with a protective cover 11 to prevent the transmission line 4 from breaking due to external stress and collision.

[0027] The sensor 2 is a conductivity sensor 2 , which can detect and distinguish whether the fluid at a location is concrete by testing the conductivity of the surrounding fluid, and transmit the signal to the detection device 3 .

[0028] The operation process of the concrete-cement slurry interface detector of the present invention is as follows:

[0029] First, place the detector into the borehole, and then slowly sink the detector into the mud; when the display light on display 5 lights up, indicating that sensor 2 has detected concrete, stop lowering the detector; the value displayed on display 5 is the interface depth of concrete-cement slurry at this time.

[0030] The present invention has been described in detail above in conjunction with specific embodiments. However, the present invention is not limited to the above description. Various changes made within the knowledge of those skilled in the art without departing from the concept of the present invention still fall within the protection scope of the present invention.

Claims

1. A concrete-cement slurry interface detector, characterized in that: The invention comprises a detection body, a sensor, a detection device, a transmission line connecting the sensor and the detection device, and a display; the detection body is a column; a detection slot is provided on the side wall of the detection body, and the sensor is arranged in the detection slot; a transmission line hole connected to the detection slot from top to bottom is provided in the middle of the detection body, and two ends of the transmission line are respectively connected to the sensor and the detection device through the transmission line hole; the lower part of the detection body is a cone; four symmetrically distributed detection slots are provided on the side wall of the detection body, and a sensor is arranged in each detection slot; the lower end face of the detection slot is an inclined surface gradually inclined downward from the inside of the detection slot to the outside; a protective net is provided at the notch of the detection slot, and the protective net is detachably connected to the side wall of the detection slot; a transmission line fixing piece is provided at the upper end of the transmission line hole, and the transmission line fixing piece is fixedly connected to the upper end of the detection body; the transmission line fixing piece is a rubber ring; a protective cover is provided on the transmission line; and the sensor is a conductivity sensor.

Images