阅读说明：本技术 单桩静载试验辅助装置 (Single-pile static load test auxiliary device ) 是由 吴建兴 吴文鑫 于 2020-07-16 设计创作，主要内容包括：本发明公开了单桩静载试验辅助装置,包括第一延长组件、第二延长组件和锁止杆；第一延长组件包括上部的第一立柱和底部的第一套筒,第一延长组件的外周侧设置有径向延伸的第一锁止盘；第二延长组件包括第二套筒和第二锁止盘,第二锁止盘位于第二延长组件的外周侧；第一套筒套接于桩头顶部,第二套筒套接于第一立柱的顶部；第一锁止盘和第二锁止盘对应的设置有第一锁止孔和第二锁止孔,锁止杆的杆身穿过第一锁止孔和第二锁止孔；该装置可以加装在桩头上代替桩头出离底面承受试验荷载,并防止基坑进水。(The invention discloses a single-pile static load test auxiliary device which comprises a first extension assembly, a second extension assembly and a locking rod, wherein the first extension assembly is connected with the first extension assembly; the first extension assembly comprises a first upright column at the upper part and a first sleeve at the bottom, and a first locking disc extending in the radial direction is arranged on the outer peripheral side of the first extension assembly; the second extension assembly comprises a second sleeve and a second locking disc, and the second locking disc is positioned on the outer peripheral side of the second extension assembly; the first sleeve is sleeved at the top of the pile head, and the second sleeve is sleeved at the top of the first upright post; a first locking hole and a second locking hole are correspondingly formed in the first locking disc and the second locking disc, and a rod body of the locking rod penetrates through the first locking hole and the second locking hole; the device can be additionally arranged on the pile head to replace the pile head to come out of the bottom surface to bear test load, and prevent the foundation pit from entering water.)

1. A single-pile static load test auxiliary device is characterized by comprising a first extension component (1), a second extension component (2) and a locking rod (3);

the first extension assembly (1) comprises a first upright post (11) at the upper part and a first sleeve (12) at the bottom, and a first locking disc (13) extending in the radial direction is arranged on the outer peripheral side of the first extension assembly (1);

the second extension assembly (2) comprises a second sleeve (22) and a second locking disc (23), the second locking disc (23) being located on an outer peripheral side of the second extension assembly (2);

the first sleeve (12) is sleeved on the top of the pile head, and the second sleeve (22) is sleeved on the top of the first upright post (11);

a first locking hole (131) and a second locking hole (231) are correspondingly formed in the first locking disc (13) and the second locking disc (23), and a rod body of the locking rod (3) penetrates through the first locking hole (131) and the second locking hole (231);

the water-retaining cloth supporting rod structure is characterized by further comprising a top cap (4) and a plurality of water-retaining cloth supporting rods (5), wherein the top cap (4) comprises an upper bearing platform (41) and a lower top cap sleeve (42);

one end of the water retaining cloth support rod (5) is detachably connected with the top cap (4), and the other end of the water retaining cloth support rod (5) is fixed on the ground;

the water retaining cloth support rod (5) is used for clamping and fixing the water retaining cloth.

2. The mono-pile static test auxiliary device according to claim 1, wherein the water-blocking cloth brace (5) comprises a groove rod (51) and a pressure rod (52) which can be buckled;

the upper part of the groove rod (51) is provided with a pressing groove (511) extending along the long direction, and the inner walls of two sides of the pressing groove (511) in the long direction are respectively provided with a clamping groove (5111) extending along the long direction;

the lower part of the pressure lever (52) is provided with a pressure tongue (521) extending along the long direction, and convex strips (5211) extending along the long direction are respectively arranged on two sides of the pressure tongue (521) in the long direction.

3. The mono-pile static test auxiliary device according to claim 2, wherein one end of the grooved bar (51) is provided with a first through hole (512);

the periphery of the top cap (4) is provided with a hanging lug (43), and the hanging lug (43) is connected with the first through hole (512) through a hook (431).

4. The mono-pile static test auxiliary device according to claim 3, wherein the other end of the grooved bar (51) is provided with a second through hole (513), and the second through hole (513) is fixed on the ground by a ground nail (514).

5. Single pile static test auxiliary device according to claim 4, characterised in that the water-stop cloth brace (5) further comprises a connector (53);

the lower part of connector (53) can be impressed in indent (511), the bottom of connector (53) has two double-screw bolts (531), two double-screw bolts (531) insert second through-hole (513) of a grooved bar (51) and first through-hole (512) of another grooved bar (51) respectively, will with the nut connector (53) are fixed with two grooved bars (51).

Technical Field

The invention relates to the technical field of construction monitoring, in particular to a single-pile static load test auxiliary device.

Background

The foundation piles of the building engineering are generally required to be detected according to national requirements, and the standard and the method of the related detection are currently implemented in technical Specification for detecting the foundation piles of buildings JGJ 106-2014.

Mono-piles are of the common pile type and refer to a stand-alone pile that uses one pile (usually a large diameter pile) to carry and transfer the load of the superstructure (usually a column). The static load test is carried out on a single pile, a pile head is required to be away from the bottom surface, a heavy object exceeding the weight of a pile bearing design value is arranged above the pile head, an oil pressure jack with an oil pressure meter and a dial indicator is placed on the pile head, the jack is continuously pressurized to the weight bearing design value or even above, the pile settlement condition is measured through the dial indicator, and the integrity of a pile body is detected through other methods after the test.

In order to perform the detection smoothly, the detection unit and the construction unit need to be arranged on site in advance. To the pile head not leave ground, will excavate the pile head, the common way has two kinds of excavation modes: the first is that all pile foundation sites are excavated and then tests are carried out, the method has huge engineering quantity, but the depth problem of all foundation piles can be solved at one time, and the sites are more uniform after excavation; the second is to find the pile to be tested, dig a 100 square meter big pit, the depth reaches the pile head position, do a test and just correspondingly dig a big pit, because the test pile is selected at random, therefore will appear a lot of unordered big pits in the whole place after excavating.

In the second mode, the excavation of a single foundation pit is to excavate a slope from one side of the pile to a predetermined position and then to clean the soil mass on the periphery side of the pile head. If the depth of the field is large and the number of foundation pits is large, the approach of the detection tool equipment is influenced, for example, a crane is not allowed to enter the ground, and the suspension arm cannot reach the detection position; in addition, a plurality of foundation piles are to be detected, the excavation amount of a pile head foundation pit is large, the construction period is long, the detection period is long, the foundation pit can accumulate water in rainy seasons, water needs to be drained before detection, and the detection period is further prolonged.

Therefore, an auxiliary device is needed to reduce the excavation amount of the pile head foundation pit, and simultaneously, the auxiliary device can effectively prevent water so as to shorten the detection period and reduce the loss of the construction unit to manpower and construction period due to detection.

Disclosure of Invention

In view of the above, the invention provides a single-pile static load test auxiliary device, which can be additionally arranged on a pile head to replace the pile head to leave the bottom surface to bear test load and prevent the foundation pit from entering water.

The single-pile static load test auxiliary device comprises a first extension assembly, a second extension assembly and a locking rod;

the first extension assembly comprises a first upright column at the upper part and a first sleeve at the bottom, and a first locking disc extending in the radial direction is arranged on the outer peripheral side of the first extension assembly;

the second extension assembly comprises a second sleeve and a second locking disc, and the second locking disc is positioned on the outer peripheral side of the second extension assembly;

the first sleeve is sleeved at the top of the pile head, and the second sleeve is sleeved at the top of the first upright post;

a first locking hole and a second locking hole are correspondingly formed in the first locking disc and the second locking disc, and a rod body of the locking rod penetrates through the first locking hole and the second locking hole;

in a single-pile static load test, the load can often reach hundreds of tons, so that machines, tools, auxiliary devices and the like related to the test need to have enough strength, the auxiliary devices can be made of steel or cast iron, and if the weight of a single assembly is too large, troubles are brought to installation and transportation, so that the invention adopts an assembled structure;

in the test process, if the connection among the components is unstable and the load collapses, the method not only can cause great damage to the site, but also can cause damage to the foundation pile and cause safety accidents; when the joint part of each subassembly received the yawing force, steel locking pole can increase the stress point, avoids first extension subassembly and second extension subassembly dislocation.

Preferably, the first locking disc and the second locking disc are provided with a plurality of first locking holes and second locking holes in one-to-one correspondence;

the number of the locking rods is equal to the number of the first locking holes and equal to the number of the second locking holes;

in order to further increase the force capacity, the number of locking levers which can be provided can be increased accordingly.

When the first extension assembly and the second extension assembly are subjected to lateral pressure, firstly the cylinder wall of the second sleeve resists against the first upright post, and secondly the locking rod resists against the first upright post;

in order to further enhance the force stability between the first extension assembly and the second extension assembly, preferably, the top surface of the first upright post is provided with an annular groove, and the bottom surface of the top wall of the inner cavity of the second sleeve is provided with an annular protrusion matched with the annular groove.

When the diameter of the detected pile head is smaller than the standard diameter, a steel plate can be additionally plugged into the first sleeve, and preferably, a plurality of clamping strips made of the steel plate are detachably arranged on the inner cavity cylinder wall of the first sleeve;

the clamping strips comprise a main clamping strip and at least one auxiliary clamping strip, convex column arrays are arranged on the outer side surfaces of the main clamping strip, and through hole arrays A matched with the convex column arrays are arranged on the auxiliary clamping strips;

the wall of the first sleeve is provided with a plurality of rows of through hole arrays B which are arranged longitudinally and matched with the convex column arrays.

Preferably, the top cap comprises an upper bearing platform and a lower top cap sleeve;

the surface area of the bearing table is slightly larger than the cross sections of the first extension assembly and the second extension assembly, reinforcing ribs are arranged at the parts of the lower part of the bearing table, which protrude out of the top cap sleeve, and are mainly used for erecting a jack, and the surface area of the bearing table is enough for erecting two oil pressure jacks connected in parallel;

similar first extension subassembly and the equipment mode of second extension subassembly, the upper portion of second extension subassembly is provided with the second stand, and the top cap cover tube coupling is in the top of second stand.

In order to effectively protect a test site and avoid rainwater damage in the period from the completion of pile head foundation pit excavation to the completion of detection, a plurality of water retaining cloth support rods are preferably designed;

one end of each water-retaining cloth support rod is detachably connected with the top cap, the other end of each water-retaining cloth support rod is fixed on the ground, and the waterproof cloth is clamped between the adjacent water-retaining cloth support rods;

the waterproof cloth material can be purchased nearby in situ.

Preferably, the water retaining cloth support rod comprises a groove rod and a pressure rod which can be buckled;

the upper part of the groove rod is provided with a pressing groove extending along the long direction, and the inner walls of two sides of the pressing groove in the long direction are respectively provided with a clamping groove extending along the long direction;

the lower part of the pressure lever is provided with a pressure tongue extending along the length direction, and both sides of the pressure tongue in the length direction are respectively provided with a convex strip extending along the length direction;

during installation, the groove rods are arranged, the waterproof cloth is laid on the groove rods, and then the pressing rods and the waterproof cloth are pressed into the pressing grooves of the groove rods.

Preferably, one end of the grooved rod is provided with a first through hole;

a hanging lug is arranged on the periphery of the top cap and is connected with the first through hole by a hook;

preferably, the other end of the grooved rod is provided with a second through hole, and the second through hole is fixed on the ground through a ground nail.

Preferably, the water retaining cloth support rod further comprises a connector, and the connector is used for assembling and extending the two groove rods;

the lower part of the connector can be pressed into the pressing groove, two studs are arranged at the bottom of the connector, the two studs are respectively inserted into the second through hole of one groove rod and the first through hole of the other groove rod, and the connector and the two groove rods are fixed by nuts;

the invention has the beneficial effects that: the single-pile static load test auxiliary device comprises a first extension assembly, a second extension assembly and a locking rod; the first extension assembly comprises a first upright column at the upper part and a first sleeve at the bottom, and a first locking disc extending in the radial direction is arranged on the outer peripheral side of the first extension assembly; the second extension assembly comprises a second sleeve and a second locking disc, and the second locking disc is positioned on the outer peripheral side of the second extension assembly; the first sleeve is sleeved at the top of the pile head, and the second sleeve is sleeved at the top of the first upright post; a first locking hole and a second locking hole are correspondingly formed in the first locking disc and the second locking disc, and a rod body of the locking rod penetrates through the first locking hole and the second locking hole; the device can be additionally arranged on the pile head to replace the pile head to come out of the bottom surface to bear test load, and prevent the foundation pit from entering water.

Drawings

The single pile static load test auxiliary device of the invention is further explained by combining the attached drawings.

FIG. 1 is a schematic structural diagram of the auxiliary device for the single-pile static load test of the invention.

FIG. 2 is a schematic view of the first extension assembly, the second extension assembly, the locking lever and the overcap engaged.

Fig. 3 is a schematic structural view of the first extension assembly.

Fig. 4 is a bottom view of the second extension assembly.

Fig. 5 is a schematic view of the structure of the gib.

Fig. 6 is an exploded view of the structure of the water guard cloth stay bar.

Fig. 7 is a top view of the grooved bars.

In the figure:

1-a first extension element, 11-a first upright, 111-an annular groove, 12-a first sleeve, 121-a through hole array B, 13-a first locking disc, 131-a first locking hole, 14-a clamping strip, 141-a main clamping strip, 1411-a convex column array, 142-an auxiliary clamping strip, 1421-a through hole array A, 2-a second extension element, 21-a second upright, 22-a second sleeve, 221-an annular bulge, 23-a second locking disc, 231-a second locking hole, 3-a locking rod, 4-a top cap, 41-a bearing table, 42-a top cap sleeve, 43-a hanging lug, 431-a hook, 5-a water-blocking cloth supporting rod, 51-a groove rod, 511-a pressure groove, 5111-a clamping groove, 512-a first through hole, 513-a second through hole, 514-ground nail, 52-compression bar, 521-tongue, 5211-convex strip, 53-connector, 531-stud, 01-pile head, 02-foundation pit and 03-soil layer.

Detailed Description

The single-pile static load test auxiliary device is further described below with reference to fig. 1 to 7, and fig. 1 shows the main structure and working mode of the single-pile static load test auxiliary device, wherein a pile head 01 is located below a soil layer 03 and does not leave the ground, a slope is excavated from one side of the pile head 01 in order to carry out test work, and floating soil around the pile head is removed to form a foundation pit 02.

The single-pile static load test auxiliary device comprises a first extension assembly 1, a second extension assembly 2 and a locking rod 3;

the first extension assembly 1 comprises a first upright post 11 at the upper part and a first sleeve 12 at the bottom part, and a first locking disc 13 extending in the radial direction is arranged on the outer peripheral side of the first extension assembly 1;

the second extension assembly 2 comprises a second sleeve 22 and a second locking disc 23, the second locking disc 23 being located on the outer peripheral side of the second extension assembly 2;

the first sleeve 12 is sleeved on the top of the pile head, and the second sleeve 22 is sleeved on the top of the first upright post 11;

the first locking disc 13 and the second locking disc 23 are correspondingly provided with a first locking hole 131 and a second locking hole 231, and the shaft of the locking rod 3 passes through the first locking hole 131 and the second locking hole 231.

In this embodiment, four lock levers 3 are provided, including a corresponding number of first lock holes 131 and second lock holes 231.

In this embodiment, the top surface of the first upright post 11 is provided with an annular groove 111, and the bottom surface of the top wall of the inner cavity of the second sleeve 22 is provided with an annular protrusion 221 which is matched with the annular groove 111;

the annular groove 111 and the annular protrusion 221 are of matching shapes, the specific design is not limited to the two matching shapes, and the present embodiment has the advantages of avoiding the deformation of the wall of the second sleeve 22 due to long-term stress and even direct explosion due to excessive stress in the test.

In this embodiment, the inner cavity wall of the first sleeve 12 is detachably provided with a plurality of holding strips 14;

the holding strip 14 can not only reduce the gap between the first sleeve 12 and the pile head, but also increase the stress strength of the first sleeve 12;

in order to increase the stress surface between the clamping strip and the first sleeve 12, the clamping strip 14 is in an arc surface shape concentric with the first sleeve 12;

the holding strip 14 comprises a main holding strip 141 and at least one auxiliary holding strip 142, the outer side surface of the main holding strip 141 is provided with a convex column array 1411, and the auxiliary holding strip 142 is provided with a through hole array A1421 matched with the convex column array 1411;

the wall of the first sleeve 12 is provided with a plurality of rows of through hole arrays B121 which are arranged longitudinally and matched with the convex column array 1411;

the auxiliary clamping strip 142 is an optional accessory, and when the thickness of the main clamping strip 141 is insufficient, the opposite surfaces of the main clamping strip 141 and the auxiliary clamping strip 142 are provided with anti-skid lines.

In the embodiment, the device further comprises a top cap 4;

the top cap 4 comprises an upper bearing platform 41 and a lower top cap sleeve 42;

the upper part of the second extension assembly 2 is provided with a second upright post 21, and a top cap sleeve 42 is sleeved on the top of the second upright post 21.

In the embodiment, the water-retaining cloth support rod structure further comprises a plurality of water-retaining cloth support rods 5;

one end of the water-retaining cloth support rod 5 is detachably connected with the top cap 4, and the other end of the water-retaining cloth support rod 5 is fixed on the ground;

the water-retaining cloth support rod 5 is used for clamping and fixing the water-retaining cloth.

In this embodiment, the water-blocking cloth support rod 5 comprises a groove rod 51 and a pressure rod 52 which can be buckled;

the upper part of the groove rod 51 is provided with a pressing groove 511 extending along the long direction, and the inner walls of the two sides of the pressing groove 511 in the long direction are respectively provided with a clamping groove 5111 extending along the long direction;

the lower portion of the pressing rod 52 has a tongue 521 extending in the longitudinal direction, and both sides of the tongue 521 in the longitudinal direction are provided with a protrusion 5211 extending in the longitudinal direction.

In this embodiment, one end of the slot rod 51 is provided with a first through hole 512;

the hanging lug 43 is arranged on the periphery of the top cap 4, and the hanging lug 43 is connected with the first through hole 512 by a hook 431;

in this embodiment, the other end of the slot rod 51 is provided with a second through hole 513, and the second through hole 513 is fixed on the ground through a ground nail 514;

if necessary, a drainage tunnel may be dug around the ground nail 514 during construction.

In this embodiment, the water-blocking cloth support rod 5 further includes a connector 53;

the lower part of the connecting head 53 can be pressed into the pressing groove 511, the bottom of the connecting head 53 is provided with two studs 531, the two studs 531 are respectively inserted into the second through hole 513 of one grooved rod 51 and the first through hole 512 of the other grooved rod 51, and the connecting head 53 and the two grooved rods 51 are fixed by nuts.

The design of the water retaining cloth support rods 5 has strong practical economic benefits, and if the foundation pit collapses and water is poured, the foundation pit needs to be cleaned again, so that labor is consumed, and the construction period is influenced. Pile foundation detection means that a building frame structure is about to be unfolded, and the period of pile foundation detection usually directly influences the labor cost of a construction unit.

The foregoing is only a preferred embodiment of this invention and it should be noted that modifications can be made by those skilled in the art without departing from the principle of the invention and these modifications should also be considered as the protection scope of the invention.