CN108643159A - Soft base deepwater diking deeply mixing cement-soil pile monitoring device and method - Google Patents

Abstract

The invention provides a device and method for monitoring the deep horizontal displacement of embankments in deep water on soft foundations. The device of the invention realizes the accurate positioning of the underwater installation direction of the inclinometer pipe by setting a positioning groove, and prevents embankment filler from entering the inclinometer pipe to damage the inclinometer by installing a blocking cover; the inclination sensor inside the measuring rod is used to directly measure the inclinometer at the measuring point. The amount of displacement and deformation is achieved by connecting multiple inclinometers in series at different elevations in the inclinometer tube to monitor the deep horizontal displacement of the soil. The invention has the advantages of simple structure, convenient installation, reliable positioning, high testing accuracy, etc., can realize real-time automatic monitoring, greatly reduces labor costs, improves work efficiency, and has wide application value.

Description

Device and method for monitoring deep horizontal displacement of embankment in deep water on soft foundation

technical field

The invention belongs to the technical field of rock and soil monitoring, and in particular relates to a device and method for monitoring deep horizontal displacement of soft foundation deep water embankment.

Background technique

In embankment filling, earth excavation, foundation treatment and other projects, it is necessary to monitor the deep horizontal displacement of the soil to understand the displacement and deformation of the soil at different depths during the construction process to ensure construction safety. At present, the monitoring of the deep horizontal displacement of the soil is mainly the inclinometer tube method, that is, the inclinometer tube is buried in the soil at the measuring point. When the soil is displaced and deformed, it will drive the change of the angle between the axis of the inclinometer tube and the plumb line. The inclinometer is manually pulled in the inclinometer tube to measure the inclination angle change at different depths of the soil, and then converted to obtain the deep horizontal displacement of the soil. However, this method has limitations in use and many disadvantages: (1) The nozzle of the inclinometer must be exposed to the water surface, which is difficult to fix, which greatly interferes with the construction, and is easily damaged by construction ships, so it is very difficult to protect; (2) Once the inclinometer It is very difficult or even impossible to repair, therefore, the continuity of data cannot be guaranteed, and monitoring safety control cannot be realized; (3) automatic monitoring cannot be realized, and only manual traction and reading can be performed, with poor observation accuracy and low work efficiency, and Difficult to implement underwater.

Contents of the invention

In order to solve many problems existing in the use of deep-layer horizontal displacement monitoring technology in deep water areas, instrument protection, and data acquisition, the present invention provides a device and method for monitoring deep-layer horizontal displacement of deep-water embankments on soft foundations. Technical scheme of the present invention is as follows:

The device for monitoring the deep horizontal displacement of embankments in deep water on soft ground comprises an inclinometer tube and an inclinometer assembly, and is characterized in that: the inclinometer tube includes a pipe body, a joint pipe, and a blocking cover; the inclinometer assembly includes a measuring rod, Connect the steel wire rope, the installation bracket, and the transmission cable; the sections of the pipe body are connected through the joint pipe; the measuring rod is placed in the pipe body and suspended on the mounting bracket, and an inclination sensor is arranged in the measuring rod. One end of the transmission cable is connected to the inclination sensor in the measuring rod, and the other end is connected to the external data acquisition device through the blocking cover; the measuring rod is fixed in series by connecting multiple steel wire ropes according to the preset depth requirement for monitoring the horizontal displacement of the soil On the mounting bracket; the blocking cover is placed on the upper part of the inclinometer tube and fixedly connected with the tube body.

The pipe body includes pipe body guide grooves and pipe body positioning grooves, the pipe body guide grooves are evenly arranged on the inner surface of the pipe body at intervals of 90°, and the pipe body positioning grooves are arranged on the inner surface of the nozzle of the pipe body; The joint pipe includes a joint pipe guide groove and a joint pipe positioning convex groove. The outer diameter of the joint pipe is consistent with the inner diameter of the pipe. The joint pipe guide grooves are evenly arranged on the inner surface of the joint pipe at intervals of 90°. The orientation of the guide groove of the pipe is consistent with that of the guide groove of the pipe body, the positioning convex groove of the joint pipe is arranged on the outer surface of the joint pipe, and the positioning convex groove of the joint pipe is matched with the positioning groove of the pipe body; the positioning groove of the pipe body It is fixedly connected with the joint pipe by four rivets perpendicular to each other; the blocking cover includes a blocking cover guiding groove and a reserved hole for cables, and the blocking cover guiding convex groove is evenly arranged on the outer surface of the blocking cover at intervals of 90°. Corresponding to the guide groove of the pipe body; the cable reserved hole is located in the center of the blocking cover, and its aperture is suitable for the transmission cable; the blocking cover is fixed to the pipe body by 4 mutually perpendicular rivets.

When the soil is displaced and deformed, it will drive the change of the angle between the axis of the inclinometer tube and the plumb line, and the inclination sensor inside the measuring rod will feel the deformation synchronously, and the displacement and deformation of the measuring point can be measured and read through the external acquisition equipment.

Utilize the monitoring method of the above-mentioned deep horizontal displacement monitoring device of deep water embankment in soft foundation, comprise the following steps:

(a) Align the hole of the drilling platform with the coordinates of the preset position, fix the anchor rope and start drilling, drill to the predetermined soil layer, and clean the bottom of the hole;

(b) Connect one end of the corresponding number of pipe bodies with the joint pipe according to the design depth, and connect multiple measuring rods end to end through connecting wire ropes according to the preset depth;

(c) Put the pipe body with the joint pipe installed into the drilled hole one by one, connect the pipe body and the joint pipe with rivets, align the guide groove of the joint pipe with the guide groove of the pipe body when docking, and put the The positioning convex groove is aligned with the positioning groove of the pipe body, and the position of the positioning groove of the pipe body is basically consistent with the preset position. When the pipe is lowered, the pipe body is filled with clean water synchronously until all the pipe bodies of the inclinometer pipe are lowered;

(d) Put the connected multiple measuring rods into the pipe body in order. When installing, the direction of the guide wheels of all measuring rods must be the same. When the first measuring rod is placed at the design elevation of the bottom of the pipe, connect the top of the last measuring rod The wire rope is fixed on the mounting bracket. After checking that the instrument signal is intact, straighten the transmission cable through the blocking cover, and fix the blocking cover on the inclinometer tube on the upper part of the mounting bracket. The distance between the blocking cover and the inclinometer tube opening should be greater than that of the connector half the length of the tube;

(e) Fix one end of the pipe body to the joint pipe with rivets, and connect the other end of the joint pipe to the top of the inclinometer pipe but not fasten it to ensure that the joint pipe can be easily pulled out from the inclinometer pipe and keep the positioning of the pipe body concave. The orientation of the groove is basically the same as the preset orientation, and then the two ends of the mounting bracket are pulled by the hoisting wire rope and lowered slowly. When lowering, keep the pipe body and the inclinometer tube docked until the inclinometer tube is placed at the bottom of the hole, and then with the help of the compass Fine-tune the direction of the positioning groove of the pipe body until it is completely consistent with the preset position, and then pull out the pipe body from the top of the inclinometer pipe;

(f) When the soil is displaced and deformed, the inclination sensor in the measuring rod will feel the deformation synchronously. The displacement and deformation of the i measuring point is Si, and the sum of the displacement values of each measuring point ΣSi is the total displacement of the soil Deformation amount.

The beneficial effects of the present invention are:

The device and method for monitoring the deep horizontal displacement of soft ground and deep water embankment of the present invention use the inclination sensor inside the measuring rod to directly measure the displacement and deformation at the measuring point, and realize the soil monitoring by connecting multiple inclinometers in series at different elevations in the inclinometer tube. The monitoring of the horizontal displacement of the deep layer of the body; the precise positioning of the underwater installation direction of the inclinometer pipe is realized by setting the positioning groove, and the embankment filler is prevented from entering the inclinometer pipe to damage the inclinometer by installing a blocking cover, effectively ensuring the accuracy and integrity of the observation data The monitoring device is located in the borehole in the soil layer as a whole, and only the transmission cable is led out of the borehole, which reduces the interference of the instrument to the construction, is easy to protect, and is not affected by external environments such as tides, wind waves, and construction machinery, which improves the reliability of the test and can be applied Working conditions that cannot be used in the prior art; the present invention has the advantages of simple structure, convenient installation, reliable positioning, high testing accuracy, and strong adaptability. In addition, through the data acquisition module, real-time automatic monitoring can also be realized, which greatly reduces labor costs, and has the advantages of high work efficiency and good stability. The invention effectively overcomes many shortcomings in the prior art, is applicable to foundation treatment projects under various complicated working conditions, and has wide application value.

Description of drawings

Fig. 1 is a schematic structural view of a monitoring device of the present invention;

Fig. 2 is the detailed structure diagram of the pipe body of the inclinometer pipe of the present invention;

Fig. 3 is a detailed structure diagram of the joint pipe of the inclinometer pipe of the present invention;

Fig. 4 is a detailed structure diagram of the plugging cover of the inclinometer tube of the present invention.

In the figure: 1-inclinometer pipe; 11-pipe body; 111-pipe body guiding groove; 112-pipe body positioning groove; 12-joint pipe; 121-joint pipe guiding groove; 122-joint pipe positioning convex groove ; 13-blocking cover; 131-blocking cover guide convex groove; 132-cable reserved hole; 2-inclinometer assembly; 21-measuring rod; 22-connecting wire rope;

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figures 1 to 4, the device for monitoring the deep horizontal displacement of soft foundation deep water embankments according to the present invention includes an inclinometer tube 1 and an inclinometer assembly 2, and the inclinometer tube 1 includes a pipe body 11, a joint pipe 12, a plug Cover 13; the inclinometer assembly 2 includes a measuring rod 21, a connecting wire rope 22, a mounting bracket 23, and a transmission cable 24; the pipe body 11 is connected by the joint pipe 12; the measuring rod 21 is placed in the In the pipe body 11, and suspended on the mounting bracket 23, a tilt sensor is arranged in the measuring rod 21, one end of the transmission cable 24 is connected to the tilt sensor in the measuring rod 21, and the other end is connected through the blocking cover 13 External data acquisition equipment; the measuring rod 21 is fixed on the mounting bracket 23 in series by connecting multiple wire ropes 22 according to the preset depth requirement of soil horizontal displacement monitoring; the blocking cover 13 is placed on the inclinometer tube The upper part of 1 is fixedly connected with the pipe body 11. The pipe body 11 includes pipe body guiding grooves 111 and pipe body positioning grooves 112, the pipe body guiding grooves 111 are evenly arranged on the inner surface of the pipe body 11 at intervals of 90°, and the pipe body positioning grooves 112 are arranged on the inner surface of the pipe body 11. The inner surface of the nozzle of the body 11; the joint pipe 12 includes a joint pipe guide groove 121, a joint pipe positioning convex groove 122, the outer diameter of the joint pipe 12 is consistent with the inner diameter of the pipe body 11, and the joint pipe guide groove 121 Evenly arranged at intervals of 90° on the inner surface of the joint pipe 12, the guide groove 121 of the joint pipe is consistent with the notch orientation of the guide groove 111 of the pipe body, and the positioning convex groove 122 of the joint pipe is arranged on the outer surface of the joint pipe 12 , the joint pipe positioning convex groove 122 is adapted to the pipe body positioning groove 112; the pipe body 11 and the joint pipe 12 are fixedly connected by 4 mutually perpendicular rivets; the blocking cover 13 includes a blocking cover guiding convex groove 131. Cable reserved holes 132, the blocking cover guide grooves 131 are evenly arranged on the outer surface of the blocking cover 13 at intervals of 90°, corresponding to the pipe guide grooves 111; the cable reserved holes 132 are located in the blocking cover 13 center, the hole diameter of which is suitable for the transmission cable 24; the blocking cover 13 is fixedly connected to the pipe body 11 by four mutually perpendicular rivets.

When the soil is displaced and deformed, it will drive the change of the angle between the axis of the inclinometer tube 1 and the vertical line, and the inclination sensor in the measuring rod 21 will feel the deformation synchronously, and the displacement and deformation of the measuring point can be measured and read through the external acquisition equipment .

The method for monitoring the deep horizontal displacement of embankment in deep water on soft foundation provided in this embodiment includes the following steps:

(a) Align the hole of the drilling platform with the coordinates of the preset position, fix the anchor rope and start drilling, drill to the predetermined soil layer, and clean the bottom of the hole;

(b) Connect one end of a corresponding number of pipe bodies 11 with the joint pipe 12 according to the design depth, and connect a plurality of measuring rods 21 end-to-end by connecting wire ropes 22 according to the preset depth;

(c) Put the pipe body 11 with the joint pipe 12 installed into the drill hole one by one, connect the pipe body 11 and the joint pipe 12 with rivets, and align the joint pipe guide groove 121 with the pipe body guide groove when docking. Slot 111, align the joint pipe positioning convex groove 122 with the tube body positioning groove 112, and make the position of the tube body positioning groove 112 basically consistent with the preset position. All the pipe bodies 11 of the inclined pipe 1 are lowered;

(d) Put the connected measuring rods 21 into the pipe body 11 in sequence. When installing, the direction of the guide wheels of all measuring rods 21 must be consistent. When the first measuring rod 21 is placed at the design elevation of the bottom of the pipe, the The top end of the measuring rod 21 is connected to the steel wire rope 22 and fixed on the mounting bracket 23. After checking that the instrument signal is intact, the transmission cable 24 is straightened through the blocking cover 13, and the blocking cover 13 is fixed on the inclinometer tube 1 on the upper part of the mounting bracket 23. The distance between the plugging cover 13 and the mouth of the inclinometer tube 1 should be greater than half the length of the joint tube 12;

(e) One end of the pipe body 11 is connected to the joint pipe 12 by a rivet, and the other end of the joint pipe 12 is docked with the top of the inclinometer pipe 1 but not fixed, so as to ensure that the joint pipe 12 can be easily pulled out from the inclinometer pipe 1, And keep the position of the positioning groove 112 of the pipe body basically consistent with the preset position, and then pull the two ends of the mounting bracket 23 through the hoisting wire rope and lower it slowly. Put the inclined pipe 1 to the bottom of the hole, and then use the compass to fine-tune the direction of the positioning groove 112 of the pipe body until it is completely consistent with the preset position, and then pull out the pipe body 11 from the top of the inclinometer pipe 1;

(f) When the soil is displaced and deformed, the inclination sensor in the measuring rod 21 will feel the deformation synchronously, the displacement and deformation of the i measuring point is Si, and the sum of the displacement values of each measuring point ΣSi is the total value of the soil displacement deformation.

The above embodiments describe the present invention in conjunction with the accompanying drawings, but it should not be construed as limiting the patent scope of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention.

Claims (3)

1. The device for monitoring the deep horizontal displacement of embankments in deep water on soft ground, comprising an inclinometer tube (1) and an inclinometer assembly (2), characterized in that: the inclinometer tube (1) includes a pipe body (11), a joint pipe (12), blocking cover (13); described inclinometer assembly (2) comprises measuring rod (21), connecting wire rope (22), mounting bracket (23), transmission cable (24); described pipe body (11 ) sections are connected through the joint pipe (12); the measuring rod (21) is placed in the pipe body (11) and suspended on the mounting bracket (23), and the measuring rod (21) is set There is an inclination sensor; one end of the transmission cable (24) is connected to the inclination sensor in the measuring rod (21), and the other end passes through the blocking cover (13) to connect to an external data acquisition device; the measuring rod (21) is The preset depth requirement for horizontal displacement monitoring is fixed on the mounting bracket (23) in series through multiple connecting wire ropes (22); the blocking cover (13) is placed on the upper part of the inclinometer pipe (1) , affixed to the pipe body (11). 2. The device for monitoring the deep horizontal displacement of deep water embankment in soft ground according to claim 1, characterized in that: the pipe body (11) includes a pipe body guide groove (111), a pipe body positioning groove (112), The pipe guide grooves (111) are evenly arranged on the inner surface of the pipe body (11) every 90°, and the pipe body positioning grooves (112) are arranged on the inner surface of the nozzle of the pipe body (11); The joint pipe (12) includes a joint pipe guide groove (121), a joint pipe positioning convex groove (122), the outer diameter of the joint pipe (12) is consistent with the inner diameter of the pipe body (11), and the joint pipe guide groove ( 121) Evenly arranged at intervals of 90° on the inner surface of the joint pipe (12), the joint pipe guide groove (121) is consistent with the notch orientation of the pipe body guide groove (111), and the joint pipe positioning convex groove (122 ) is arranged on the outer surface of the joint pipe (12), and the joint pipe positioning convex groove (122) is adapted to the pipe body positioning groove (112); the pipe body (11) and the joint pipe (12) pass through 4 rivets perpendicular to each other are fixed; the blocking cover (13) includes a blocking cover guide groove (131) and a cable reserved hole (132), and the blocking cover guide convex groove (131) is evenly arranged at intervals of 90°. The outer surface of the blocking cover (13) corresponds to the guide groove (111) of the pipe body; the cable reserved hole (132) is located at the center of the blocking cover (13), and its aperture is the same as that of the transmission cable (24) Adaptation; the blocking cover (13) is affixed to the pipe body (11) through 4 mutually perpendicular rivets. 3. Utilize the monitoring method of the soft foundation deep water embankment deep layer horizontal displacement monitoring device according to claim 1 or 2, it is characterized in that: the method comprises the following steps: (a) Align the hole of the drilling platform with the coordinates of the preset position, fix the anchor rope and start drilling, drill to the predetermined soil layer, and clean the bottom of the hole; (b) Connect one end of the corresponding number of pipe bodies (11) with the joint pipe (12) according to the design depth, and pass a plurality of the measuring rods (21) through the connecting wire ropes (22) according to the preset depth )End to end; (c) Put the pipe body (11) with the joint pipe (12) installed into the drilled hole one by one, and connect the pipe body (11) with the joint pipe (12) by rivets, The joint pipe guide groove (121) is aligned with the pipe body guide groove (111), the joint pipe positioning convex groove (122) is aligned with the pipe body positioning groove (112), and the pipe body The orientation of the body positioning groove (112) is basically consistent with the preset orientation, and when the tube is lowered, the tube body (11) is filled with clean water synchronously until all the tube bodies (11) of the inclinometer tube (1) are lowered; (d) Put the multiple connected measuring rods (21) into the tube body (11) in sequence. When installing, the guide wheels of all measuring rods (21) must be in the same direction. When the first measuring rod ( 21) After placing it at the design elevation of the bottom of the inclinometer pipe (1), fix the connecting steel wire rope (22) at the top of the last measuring rod (21) on the mounting bracket (23), check that the signal of the instrument is intact Described transmission cable (24) straightens through described blocking cover (13), and blocking cover (13) is fixed on the described inclinometer tube (1) of mounting bracket (23) top, and blocking cover (13) The distance from the mouth of the inclinometer pipe (1) is greater than half the length of the joint pipe (12); (e) fasten one end of the pipe body (11) to the joint pipe (12) with a rivet, and connect the other end of the joint pipe (12) to the top of the inclinometer pipe (1) but not fasten it, Ensure that the joint pipe (12) can be easily pulled out from the inclinometer pipe (1), and keep the orientation of the positioning groove (112) of the pipe body basically consistent with the preset orientation, and then pull the installation bracket ( 23) Slowly lower both ends, keep the pipe body (11) docked with the inclinometer pipe (1) and not disengage when lowering, until the inclinometer pipe (1) is placed at the bottom of the hole, and then use the compass to fine-tune the positioning groove of the pipe body (112) until completely consistent with the preset orientation, then the pipe body (11) is pulled out from the top of the inclinometer pipe (1); (f) When the soil is displaced and deformed, the inclination sensor in the measuring rod (21) will feel the deformation synchronously, and the displacement and deformation of the i measuring point is Si, and the sum of the displacement values of each measuring point ΣSi is The total displacement and deformation of the soil.