CN115478525A - In-hole Standard Penetration Test Hammer and Test Method Applied to Deep Formation Testing - Google Patents

Abstract

The invention discloses an in-hole standard penetration test hammer applied to deep stratum testing. The device comprises a standard penetration test hammer in a hole and a guide device in the hole; the standard penetration test hammer in the hole comprises a standard penetration hammer in the hole and an inner rod of the penetration hammer; the upper end of an inner rod of the penetration hammer extends upwards to form a standard penetration hammer in the hole, the upper end of the inner rod of the penetration hammer is respectively connected with the measuring rope and the steel wire rope, and the lower end of the inner rod extends downwards to form a standard penetration hammer in the hole; the connecting rod is connected with the standard penetration device; the in-hole guide device is respectively arranged at the upper end of an inner rod of the penetration hammer and the joint of the connecting rod and the standard penetration device; the in-hole guide device is of a structure with two concave ends and a convex middle part; the outer convex part of the in-hole guide device is tightly attached to the wall of the drilled hole; the concave part is positioned at the outer side of the connecting rod and clings to the connecting rod. The invention has the advantages of small volume and capability of completing the standard penetration test in the drill hole. The invention discloses a standard penetration test method of an in-hole standard penetration test hammer applied to deep stratum testing.

Description

In-hole Standard Penetration Test Hammer and Test Method Applied to Deep Formation Testing

technical field

The invention relates to the technical field of engineering drilling testing, more specifically, it is a standard penetration test hammer used in deep formation testing, more specifically, it is a small-sized hammer that can be moved in a borehole to complete a standard hammer. Standard penetration test hammer for penetration testing. The invention also relates to a standard penetration test method of an in-hole standard penetration test hammer used in deep formation testing.

Background technique

Whether it is building a reservoir dam or a deep tunnel, the problem of deep overburden is often encountered. The properties of the overburden are the key factors affecting the safe operation of the dam and the safety of tunnel construction. Therefore, the properties of the deep overburden must be ascertained. Existing overburden testing techniques include: taking original soil samples, static penetration test, standard penetration test, cross plate shear test, side pressure test. Taking original soil samples, static penetration test, cross-plate shear test and existing standard penetration tests are not suitable for deep formation tests, especially for deep sand layers and sand pebbles. The side pressure test has high requirements on the integrity of the borehole wall, and the hole walls of the sand layer and sand pebble formation are mostly incomplete. Therefore, the side pressure test is not suitable for the deep sand layer and sand pebble formation.

At present, in the field of engineering geological exploration, the buried depth of the standard penetration test for drilling is generally less than 20m, and the maximum depth of standard penetration rod length correction specified in relevant domestic regulations is 21m. In addition, the standard penetrator uses a drill pipe to be lowered into the bottom of the hole, and the impact energy of the standard penetrating hammer above the ground is transmitted to the standard penetrator at the bottom of the hole through the drill pipe. The larger the rod length, the greater the impact energy loss. The obtained test The data cannot represent the real properties of deep formations and cannot be applied.

Deep stratum testing is a problem that has plagued large-scale engineering surveys for a long time. There are currently no suitable testing techniques for testing deep formations.

Therefore, it is necessary to develop an in-hole standard penetration test hammer that can realize deep formation testing.

Contents of the invention

The first purpose of the present invention is to provide an in-hole standard penetration test hammer used in deep formation testing. It is small in size and can move in the borehole to complete the standard penetration test. It has strong applicability. The combined use of the device and the standard penetrating hammer in the hole makes it suitable for testing deep overburden layers under various geological conditions, especially for deep sand and sandy pebble formations.

The second object of the present invention is in order to provide the standard penetration test method of the standard penetration test hammer in the hole that is applied to the deep formation test, the standard penetration test hammer is changed from the surface movement to the completion of the test by the movement in the borehole, The test data is accurate, no rod length conversion is required, and the operation is simple.

In order to achieve the above-mentioned first purpose of the present invention, the technical solution of the present invention is: a standard penetration test hammer used in deep formation testing, the difference is: the standard penetration test hammer used in deep formation testing The test hammer is used in the borehole;

The in-hole standard penetration test hammer used in deep formation testing includes the in-hole standard penetration test hammer and the in-hole guide device;

The standard penetration test hammer in the hole is a piercing hammer;

The standard penetration test hammer in the hole includes the standard penetration hammer in the hole and the inner rod of the penetration hammer;

Standard penetrating hammer in the penetrating hole of the inner rod of the penetrating hammer; the upper end of the penetrating hammer’s inner rod protrudes upwards into the hole and the standard penetrating hammer is connected with the measuring rope, and the lower end protrudes downwards into the hole. The base is connected with the connecting rod; the connecting rod is connected with the standard penetrator;

The guide device in the hole is used to make the standard penetrator and the inner rod of the penetrating hammer completely located in the center of the drilling hole; the guide device in the hole is respectively set at the upper end of the inner rod of the penetrating hammer, and the connection between the connecting rod and the standard penetrator;

The guide device in the hole has a structure of concave at both ends and convex in the middle; the diameter of the convex part of the guide device in the hole is smaller than the diameter of the drilled hole, and it is close to the wall of the drilled hole;

The inner concave parts are located on the outer side of the connecting rods and respectively cling to the connecting rods.

In the above technical scheme, symmetrical crescent-shaped structures are arranged on both sides of the standard penetrating hammer in the hole to provide a flow channel for the slurry in the hole when the standard penetrating hammer in the hole moves in the hole, and a through hole is set in the middle; The hammer inner rod is located in the through hole.

In the above technical scheme, the standard penetration hammer in the hole has an outer diameter of 80mm, an inner rod diameter of less than 25mm, a length of 1760mm, and a stroke of 760mm; the standard penetration hammer in the hole has a hammer weight of 67.43kg;

The material of the standard penetrating hammer in the hole is selected from high-density metals such as tungsten, platinum, and osmium.

In the above technical solution, the guide device in the hole includes an elastic metal reed and a reed base;

The reed base has a circular structure;

A plurality of elastic metal reeds are inlaid on the reed base in a ring shape;

The middle part of the reed base is provided with a round hole with a threaded buckle, and the reed base is connected to the upper end of the standard penetrating hammer and the upper end of the standard penetrator in the hole through the threaded buckle

The elastic metal reed has an elastic structure with concave at both ends and convex in the middle;

The diameter of the protruding part of the elastic metal reed is smaller than the diameter of the drilled hole; the protruding part of the elastic metal reed is closely attached to the wall of the drilled hole.

In the above technical scheme, the width of each elastic metal reed is 1 cm and the length is 15 cm.

In the above technical solution, the guide device in the hole includes a first guide device in the hole and a second guide device in the hole;

The guide device in the first hole is located at the upper end of the inner rod of the penetrating hammer;

The guide device in the second hole is located at the upper end of the standard penetrator;

The measuring rope is connected to the upper surface of the base of the guiding device in the first hole;

The standard penetrator is attached to the lower surface of the base of the guide in the second bore.

In the above technical solution, the hammering base adopts a metal base with a diameter of 6 cm.

In the above technical scheme, the standard penetrating hammer and the standard penetrator in the hole are connected by a wire rope and lowered into the borehole;

A ring-shaped steel plate is installed in the middle of the hoisting of the drilling rig, a part of the ring-shaped steel plate is wound with a thick steel wire rope for drilling, and the other part of the ring-shaped steel plate is wound with a thin steel wire rope for standard penetration tests in deep holes.

In order to realize the above-mentioned second purpose of the present invention, the technical solution of the present invention is: the standard penetration test method of the standard penetration test hammer in the hole applied to the deep formation test, which is characterized in that: comprising the following steps,

When the gravity penetrating test is used to test the soft soil layer, the in-hole standard penetration test hammer used in the deep formation test adopts the standard penetrator, the in-hole standard penetration test hammer and the in-hole guide device;

When the gravity penetration test is used for sand and gravel layer, the standard penetrator is replaced by the gravity penetration probe, that is, the gravity penetration probe, the standard penetration test hammer in the hole and the guide device in the hole are used for deep formation testing;

Step 1. Connect the standard penetrating test hammer in the hole (including the standard penetrating hammer in the hole, the inner rod of the penetrating hammer, the hammering base, etc.) with the in-hole guide device to the standard penetrator;

Step 2: Lower the connected standard penetrating hammer and standard penetrator to the bottom of the borehole with a wire rope;

Step 3: Test the depth of the bottom of the standard penetrator with a measuring rope, and use a wire rope to repeatedly lift the standard penetration hammer in the hole and hit the hammering base until the standard penetrator enters the bottom soil layer of the borehole at a depth of 15cm; each time the lifting height is less than 70cm ;

Step 4: Slowly lower the standard penetrating hammer in the hole to the hammering base with a wire rope, and mark the opening of the wire rope, lift the wire rope so that the mark on the wire rope rises by 76cm, put it down quickly, and hit the hammering base, record the depth of penetration;

Repeat step 4 until the total penetration depth is 30cm;

Step 5: Take out the standard penetration test hammer in the hole (including the standard penetration hammer in the hole, the inner rod of the penetration hammer, the hammering base, etc.) and the standard penetrator from the borehole.

In the above technical solution, in Step 3, when the standard penetrating hammer in the hole hits the hammering base, the lifting height is less than 70cm each time.

The "deep formation" in the present invention refers to a formation with a depth greater than or equal to 200m; the present invention can test a depth greater than or equal to 200m.

The present invention has the following advantages:

(1) the present invention is small in volume, and can move up and down inside the borehole (the volume of the standard penetration test hammer in the hole applied to the deep formation test according to the present invention is 3.47 liters, about 8 centimeters in diameter, and the borehole generally only has 11 centimeters , therefore, the present invention can move up and down inside the borehole); use the steel wire rope to complete the standard penetration test; adopt the guide device to make the inner rod of the standard penetrator and the penetrating hammer vertical to the center of the drilling hole; the standard penetrating test hammer in the hole It is made of high-density metal material, weighs about 67kg, and has a volume of about 3500cm ³ . It uses steel wire rope (without drill pipe) to complete the deep formation standard penetration test; it solves the problem of inaccurate test data caused by the large energy loss of the deep formation standard penetration test. It also solves the problem that standard penetration tests in deep formations cannot be corrected accurately, which is of great significance for engineering construction surveys in areas with deep overburden layers; it overcomes the problem that standard penetration tests of existing technologies use drill pipes to connect standard penetrators to test formations, Large volume (the existing standard penetration test hammer is located on the surface during the test, and is connected with the standard penetrator through the drill pipe. The test hammer piercing hammer cannot be lowered into the borehole for testing), resulting in the inability to measure or the high energy loss of the standard penetration test in deep formations, and the unusable test data obtained;

(2) In the present invention, the standard penetrating hammer impacts the drill pipe above the ground for stratum testing, and changes it to impacting the standard penetrator at a certain height above the bottom of the borehole for stratum testing, which improves the accuracy of the test and eliminates the need for drilling. Long correction calculation; in addition, the present invention uses steel wire rope to complete the test (without drilling pipe), and does not need to drill down and lift the drill, which greatly improves the working efficiency.

Description of drawings

Fig. 1 is a structural schematic diagram of the present invention.

Fig. 2 is a structural schematic diagram of a standard penetration hammer in a hole in the present invention.

Fig. 3 is a schematic structural view of the guide device in the hole of the present invention.

In the figure 1-steel wire rope, 2-measuring rope, 3-guiding device in the hole, 3.1-elastic metal reed, 3.2 reed base, 3.21-round hole with threaded buckle, 3A-guiding device in the first hole, 3B -Guiding device in the second hole, 4-standard penetrating hammer in the hole, 4.1-through hole, 4.2-crescent structure, 5-inner rod of penetrating hammer, 6-hammering base, 7-connecting rod, 8-standard Penetrator.

detailed description

The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings, but they do not constitute a limitation to the present invention, and are only examples. At the same time, the advantages of the present invention are clearer and easier to understand through the description.

The in-hole standard penetration test hammer in the present invention is respectively from bottom to top: the connecting screw, the penetration hammer base, the inner rod of the piercing hammer and the surrounding piercing hammer (ie, the standard penetration hammer 4 in the hole), The steel wire rope 1 connected to the piercing hammer; the upper and lower parts of the standard penetration test hammer in the hole are respectively connected to a hole guide 3, and the lower end of the lower hole guide 3 is connected to a standard penetrator 8. The invention is small in size and can move up and down inside the borehole; the standard penetration test is completed by using a steel wire rope; the standard penetrator and the inner rod of the penetrating hammer are vertical to the center of the borehole by using a guide device. By modifying the material, shape, size and other auxiliary facilities of the standard penetration hammer, the invention realizes the purpose of transferring the hammering movement of the standard penetration test from above the ground to the deep part of the borehole, and solves the inaccurate and inaccurate test data of the deep formation. Fix problems.

The present invention adopts heavy metal with high density to make the piercing hammer, its weight is basically the same as that of the existing standard penetrating hammer, and the falling distance is consistent, compared with the existing accurate standard penetration test, the deviation is small; the present invention adopts the heavy metal with high density The heavy metal piercing hammer (about 67kg) is basically the same as the existing standard penetrating hammer, and the falling distance is basically the same as the existing standard penetrating hammer (the falling distance of the present invention is about 0.76m), and the falling distance is shorter. Can greatly reduce the impact of borehole inclination on test results, so the present invention is applicable to boreholes with an inclination angle less than or equal to 4 degrees (that is, the present invention is applicable to inclined boreholes); overcomes the weight of prior art piercers (generally 10kg or 15kg) is less than the weight of the existing standard penetration hammer (about 63.5kg), and the drop distance of the prior art piercing hammer (about 3.217m) is much greater than the drop distance of the existing standard penetration test hammer (The falling distance is about 0.76m). Due to the large falling distance in the prior art, the piercing hammer is affected by the inclination of the drilling hole during the falling process, and it is difficult for the piercing hammer to maintain a free fall state in the hole. The impact and friction of the center rod of the hammer reduce the actual impact energy, which has a great influence on the accuracy of the test results. Compared with the existing accurate standard penetration test, the deviation is large, resulting in the defect of low accuracy of the test results of the existing technology; at the same time , the present invention only adds less equipment, and only needs to increase the ground hoisting system and the standard penetration test hammer in the hole used in deep formation testing. Many (additional mud pulser, battery, motor, etc. are required), and it is difficult to popularize and apply defects in practical applications.

Referring to the accompanying drawings, it can be seen that: a standard penetration test hammer in a hole used in deep formation testing is characterized in that it is used in a borehole;

The in-hole standard penetration test hammer used in deep formation testing includes the in-hole standard penetration test hammer and the in-hole guide device;

The standard penetration test hammer in the hole is a piercing hammer;

The hole standard penetration test hammer includes the hole standard penetration hammer 4 and the penetration hammer inner rod 5;

The standard penetration hammer 4 in the penetrating hammer inner rod 5 penetrates the hole; the upper end of the penetrating hammer inner rod 5 protrudes upwards to the standard penetrating hammer 4 in the hole to connect with the measuring rope 2, and the lower end protrudes downwards to the standard penetrating hammer 4 in the hole. The hammer 4 is connected to the connecting rod 7 by hammering the base 6; the connecting rod 7 is connected to the standard penetrator 8;

The guide device 3 in the hole is used to make the standard penetrator 8 and the inner rod of the penetrating hammer completely located in the center of the borehole. When the test equipment is placed on the bottom of the borehole with a steel wire rope, in order to avoid the friction of the standard penetrating test hammer on the hole wall, reduce Effective impact energy; the guide device 3 in the hole is set at the connection between the connecting rod 7 and the standard penetrator 8, and is respectively located at the upper end of the inner rod 5 of the penetrating hammer and the upper end of the standard penetrator 8;

The guide device 3 in the hole has a structure of concave at both ends and convex in the middle; the diameter of the convex part of the guide device 3 in the hole is smaller than the diameter of the drilled hole, and it is close to the wall of the drilled hole;

The concave part is located on the outside of the connecting rod 7 and is close to the connecting rod 7. The measuring rope 2 adopts a suspended steel wire rope. The present invention uses the length of the suspended steel wire rope to measure the penetration depth of the test. The operation is simple and the depth is greater than or equal to The measurement requirements of 200m formation.

Further, symmetrical crescent-shaped structures 4.2 are arranged on both sides of the standard penetration hammer 4 in the hole to increase the gap between the penetration hammer and the hole wall and reduce the resistance of the relative movement of groundwater to the standard penetration test hammer during the test. A through hole 4.1 is set; the inner rod 5 of the penetrating hammer is located in the through hole 4.1. The two sides of the standard penetrating hammer of the present invention are arranged in a crescent shape to provide passages for the upward movement of the slurry in the hole when the penetrating hammer moves downward first.

Furthermore, the standard penetrating hammer 4 in the hole has an outer diameter of 80 mm, an inner rod diameter of less than 25 mm, a length of 1760 mm, and a stroke of 760 mm; the standard penetrating hammer 4 in the hole considers the influence of groundwater buoyancy, and the hammer weighs 67.43 kg;

The standard penetration hammer 4 in the hole is made of high-density metals such as tungsten, platinum, and osmium. The space in the drill hole is narrow, and the volume of the standard penetration test hammer is limited. On the premise of ensuring sufficient weight, only high-density metals can be used. Metals, such as tungsten, have a density of 19.32g/cm ³ . The invention adopts the heavy metal with high density to make the standard penetrating hammer, reduces the volume of the hammer, is convenient to move in the narrow drill hole, and is convenient to carry out the hammering test.

Further, the guide device 3 in the hole includes an elastic metal reed 3.1 and a reed base 3.2;

The reed base 3.2 has a circular structure with a diameter of 8 cm;

A plurality of elastic metal reeds 3.1 are annularly inlaid on the reed base 3.2;

The middle part of the reed base 3.2 is provided with a round hole 3.21 with a screw, and the reed base 3.2 is connected to the upper end of the inner rod 5 of the penetration hammer and the upper end of the standard penetrator 8 through the screw;

The elastic metal reed 3.1 has an elastic structure with concave at both ends and convex in the middle;

Elastic metal reed 3.1 The diameter of the protruding part is smaller than the diameter of the drilled hole (the diameter of the protruding part is 0.5cm smaller than the diameter of the drilled hole); the elastic metal reed 3.1 The protruding part is closely attached to the wall of the drilled hole, so that the standard penetration in the middle of the hole The inner rod of the hammer remains centered and vertical; when it meets the unevenness of the hole wall, the reed deforms to ensure that the standard penetration test device can reach the test position smoothly.

Further, each elastic metal reed 3.1 has a width of about 1 cm and a length of about 15 cm, and has certain rigidity and good elasticity. The invention is provided with an elastic metal reed to ensure that the penetrating hammer hits the hammering base vertically without connecting the drill rod.

Further, the in-hole guide device 3 includes a first in-hole guide device 3A and a second in-hole guide device 3B;

The guide device 3A in the first hole is located at the upper end of the inner rod 5 of the penetrating hammer;

The second in-hole guiding device 3B is located at the upper end of the standard penetrator 8;

The measuring rope 2 is connected to the upper surface of the base of the guide device 3A in the first hole, and the penetration depth is measured by using the measuring rope.

The standard penetrator 8 is connected to the lower surface of the base of the second in-hole guide 3B.

Further, the hammering base 6 adopts a metal base with a diameter of 6 cm; appropriately reduce the area of the hammering base, reduce the probability of sediment in the hole being deposited on the base, and try to avoid the impact of sediment on the upper part of the base on the test results.

Further, the standard penetrator 4 and the standard penetrator 8 in the hole are connected by a wire rope and lowered into the borehole;

A ring-shaped steel plate is arranged in the middle of the hoisting of the drilling rig, a part of the ring-shaped steel plate is wound with a thick steel wire rope with a diameter of about 1 cm for drilling, and the other part of the ring-shaped steel plate is wound with a thin steel wire rope with a diameter of about 0.5 cm for a standard penetration test in a deep hole; if necessary, two kinds of steel wire ropes It can be connected and used to meet the test depth requirements of the present invention; the present invention uses a wire rope to complete the standard penetration test without using a drill pipe for force transmission. Compared with the conventional standard penetration test, the work efficiency is high. The thick steel wire rope in the present invention is used for normal drilling, and the thin steel wire rope is specially used for the standard penetration test in the hole. Because the hole depth is large, the thin steel wire rope is small in size and light in weight, which is convenient for the operator to accurately perceive the standard penetrator reaching the drill hole. time at the bottom of the hole, improving measurement accuracy.

The standard penetration test in the prior art uses a drill pipe to connect the standard penetrator to the test formation, while the present invention uses a steel wire rope to place the standard penetrator and the standard penetrating hammer connected to it into the test formation; the present invention uses a steel wire rope instead of a drill. The rod reduces the drilling rod connection and removal process when the drill rod is lowered in the prior art, especially for deep hole testing. The prior art uses 3 to 4 hours to run the drill rod into the drill rod and remove the drill rod each time. The invention adopts the steel wire rope to run in and lift up within one hour, which greatly improves the work efficiency.

Referring to the accompanying drawings, it can be seen that the standard penetration test method of the standard penetration test hammer in the hole applied to the deep formation test is characterized in that it includes the following steps,

When the gravity penetrating test is used to test the soft soil layer, the in-hole standard penetration test hammer used in the deep formation test adopts the standard penetrator 8, the in-hole standard penetration test hammer and the in-hole guide device 3;

When the gravity penetration test is used for sand and gravel layer, the standard penetrator 8 is replaced by the gravity penetration probe, that is, the gravity penetration probe, the standard penetration test hammer in the hole and the guide device in the hole are used for deep formation testing. 3;

Step 1, connecting the standard penetrating test hammer in the hole (including the standard penetrating hammer 4 in the hole, the inner rod 5 of the penetrating hammer, the hammering base 6, etc.) with the in-hole guide device 3 to the standard penetrator 8;

Step 2, use wire rope 1 to lower the connected standard penetrator 4 and standard penetrator 8 to the bottom of the borehole;

Step 3: Use the measuring rope 2 to test the bottom depth of the standard penetrator 8, and use the wire rope 1 to repeatedly lift the standard penetrating hammer 4 in the hole to hit the hammering base 6 until the standard penetrator 8 enters the soil layer at the bottom of the borehole at a depth of 15 cm; Each lifting height should be less than 70cm;

Step 4: Slowly lower the standard penetrating hammer 4 in the hole to the hammering base 6 with the steel wire rope 1, mark the opening of the steel wire rope 1, lift the steel wire rope 1 so that the marked position of the steel wire rope 1 rises by 76cm, and then put it down quickly. Strike the hammering base 6, and record the depth at which the mark on the steel wire moves downward (i.e. the depth at which the lower standard penetrator 8 penetrates downward);

Repeat step 4 until the total penetration depth is 30cm;

Step 5, the standard penetration test hammer in the hole (including the standard penetration hammer 4 in the hole, the inner rod 5 of the penetration hammer, the hammering base 6, etc.) and the standard penetrator 8 are taken out of the borehole;

When the sand and gravel layer is tested by gravity penetration testing, the standard penetrator 8 is replaced with a gravity penetration probe, and the operation can be carried out according to the above steps.

Further, in Step 3, when the standard penetrating hammer 4 in the hole hits the hammering base 6, the lifting height is less than 70 cm each time.

Other unspecified parts belong to the prior art.

Claims (10)

1. An in-hole standard penetration test hammer applied to deep formation testing, characterized in that: used in boreholes; The in-hole standard penetration test hammer used in deep formation testing includes the in-hole standard penetration test hammer and the in-hole guide device; The standard penetration test hammer in the hole is a piercing hammer; The standard penetration test hammer in the hole includes the standard penetration hammer (4) in the hole and the inner rod (5) of the penetration hammer; The inner rod (5) of the penetrating hammer penetrates the standard penetrating hammer (4) in the hole; the upper end of the inner rod (5) of the penetrating hammer protrudes upwards to the standard penetrating hammer (4) in the hole and is connected with the measuring rope (2), The lower end protrudes downward from the standard penetrating hammer (4) in the hole, and is connected with the connecting rod (7) through the hammering base (6); the connecting rod (7) is connected with the standard penetrator (8); The in-hole guide device 3 for making the standard penetrator (8) and the inner rod (5) of the penetrating hammer completely located in the center of the drilling hole is respectively arranged on the upper end of the inner rod (5) of the penetrating hammer, the connecting rod (7) and the standard penetrator. The connection of penetrator (8); The guide device in the hole (3) has a structure of concave at both ends and convex in the middle; the diameter of the convex part of the guide device in the hole (3) is smaller than the diameter of the drilled hole, and it is close to the wall of the drilled hole; The concave part is located on the outer side of the connecting rod (7) and is close to the connecting rod (7). 2. The in-hole standard penetration test hammer applied to deep formation testing according to claim 1, characterized in that: symmetrical crescent-shaped structures (4.2) are arranged on both sides of the in-hole standard penetration hammer (4), and the middle part A through hole (4.1) is provided; the inner rod (5) of the penetrating hammer is located in the through hole (4.1). 3. The in-hole standard penetration test hammer applied to deep formation testing according to claim 1, characterized in that: the in-hole standard penetration hammer (4) has an outer diameter of 80 mm, an inner rod diameter of less than 25 mm, a length of 1760 mm, and a stroke 760mm; the standard penetration hammer (4) in the hole weighs 67.43kg; The material of standard penetrating hammer (4) in the hole is selected these high density metals of tungsten, platinum, osmium. 4. The in-hole standard penetration test hammer applied to deep formation testing according to claim 3, characterized in that: the in-hole guide (3) includes an elastic metal reed (3.1) and a reed base (3.2); The reed base (3.2) has a circular structure; A plurality of elastic metal reeds (3.1) are annularly inlaid on the reed base (3.2); The middle part of the reed base (3.2) is provided with a round hole (3.21) with a screw, and the reed base (3.2) is connected to the upper end of the inner rod (5) of the penetrating hammer and the upper end of the standard penetrator (8) through the screw; The elastic metal reed (3.1) has an elastic structure with both ends concave and the middle part convex; The diameter of the protruding part of the elastic metal reed (3.1) is smaller than the diameter of the drilled hole; the protruding part of the elastic metal reed (3.1) is in close contact with the wall of the drilled hole. 5. The in-hole standard penetration test hammer applied to deep formation testing according to claim 4, characterized in that: the elastic metal reed (3.1) has a width of 1 cm and a length of 15 cm. 6. The in-hole standard penetration test hammer applied to deep formation testing according to claim 5, characterized in that: the in-hole guide (3) includes a first in-hole guide (3A) and a second in-hole guide device (3B); The guide device (3A) in the first hole is located at the upper end of the inner rod (5) of the penetrating hammer; The second hole guide (3B) is located at the upper end of the standard penetrator (8); The measuring rope (2) is connected to the upper surface of the base of the guide device (3A) in the first hole; The standard penetrator (8) is connected to the lower surface of the base of the second in-hole guide (3B). 7. The in-hole standard penetration test hammer applied to deep formation testing according to claim 6, characterized in that: the hammering base (6) adopts a metal base with a diameter of 6 cm. 8. The in-hole standard penetration test hammer applied to deep formation testing according to claim 7, characterized in that: the in-hole standard penetration hammer (4) and the standard penetrator (8) are connected by a wire rope (1) Lower into the borehole. 9. according to the standard penetration test method of the in-hole standard penetration test hammer that is applied to the deep formation test according to any one of claims 1 to 8, it is characterized in that: comprising the following steps, When the gravity penetrating test is used to test the soft soil layer, the in-hole standard penetration test hammer used in the deep formation test adopts the standard penetrator (8), the in-hole standard penetration test hammer and the in-hole guide device (3) ; When gravity penetration testing is used for gravel layers, the standard penetrator (8) is replaced with a gravity penetration probe, that is, the gravity penetration probe, the standard penetration test hammer in the hole, and the in-hole guiding device (3); Step 1, connecting the in-hole standard penetration test hammer with the in-hole guide (3) to the standard penetrator (8); Step 2, use the wire rope (1) to lower the connected standard penetrator (4) and standard penetrator (8) to the bottom of the borehole; Step 3: Use the measuring rope (2) to test the bottom depth of the standard penetrator (8), and use the wire rope (1) to repeatedly lift the standard penetrating hammer (4) in the hole to hit the hammering base (6) to the standard penetrator (8) Enter the depth of 15cm in the soil layer at the bottom of the borehole; Step 4, use the wire rope (1) to slowly place the standard penetrating hammer (4) in the hole to the hammering base (6), mark the hole of the wire rope (1), and lift the wire rope (1) so that The steel wire rope (1) rises 76cm at the mark, puts it down quickly, hits the hammering base (6), and records the penetration depth; Repeat step 4 until the total penetration depth is 30cm; Step five, take out the standard penetration test hammer and the standard penetrator (8) from the borehole. 10. The standard penetration test method of the in-hole standard penetration test hammer applied to deep formation testing according to claim 9, characterized in that: in step 3, the in-hole standard penetration hammer (4) hits the hammer When hitting the base (6), the lifting height is less than 70cm each time.

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